401261501 has 4 divisors (see below), whose sum is σ = 403723392. Its totient is φ = 398799612.

The previous prime is 401261491. The next prime is 401261521. The reversal of 401261501 is 105162104.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401261501 is a prime.

It is a super-2 number, since 2×401261501² = 322021584369546002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401261521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230701 + ... + 1231026.

It is an arithmetic number, because the mean of its divisors is an integer number (100930848).

Almost surely, 2^401261501 is an apocalyptic number.

It is an amenable number.

401261501 is a deficient number, since it is larger than the sum of its proper divisors (2461891).

401261501 is a wasteful number, since it uses less digits than its factorization.

401261501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461890.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 401261501 is about 20031.5126987454. The cubic root of 401261501 is about 737.5800551228.

The spelling of 401261501 in words is "four hundred one million, two hundred sixty-one thousand, five hundred one".