40257001 has 4 divisors (see below), whose sum is σ = 40363600. Its totient is φ = 40150404.

The previous prime is 40256989. The next prime is 40257013. The reversal of 40257001 is 10075204.

40257001 = 118² + 119² + ... + 496².

40257001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40256989) and next prime (40257013).

It is a cyclic number.

It is not a de Polignac number, because 40257001 - 2²³ = 31868393 is a prime.

It is a super-2 number, since 2×40257001² = 3241252259028002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40257001.

It is not an unprimeable number, because it can be changed into a prime (40257031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52731 + ... + 53488.

It is an arithmetic number, because the mean of its divisors is an integer number (10090900).

Almost surely, 2^40257001 is an apocalyptic number.

It is an amenable number.

40257001 is a deficient number, since it is larger than the sum of its proper divisors (106599).

40257001 is a wasteful number, since it uses less digits than its factorization.

40257001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106598.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 40257001 is about 6344.8405023294. The cubic root of 40257001 is about 342.7260688039.

It can be divided in two parts, 4025 and 7001, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 40257001 in words is "forty million, two hundred fifty-seven thousand, one".