40137457 has 4 divisors (see below), whose sum is σ = 40227300. Its totient is φ = 40047616.

The previous prime is 40137437. The next prime is 40137469. The reversal of 40137457 is 75473104.

40137457 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.

It can be written as a sum of positive squares in 2 ways, for example, as 14371681 + 25765776 = 3791^2 + 5076^2 .

It is a cyclic number.

It is not a de Polignac number, because 40137457 - 2¹¹ = 40135409 is a prime.

It is a super-2 number, since 2×40137457² = 3222030908853698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40137407) 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, 44248 + ... + 45145.

It is an arithmetic number, because the mean of its divisors is an integer number (10056825).

Almost surely, 2^40137457 is an apocalyptic number.

It is an amenable number.

40137457 is a deficient number, since it is larger than the sum of its proper divisors (89843).

40137457 is an equidigital number, since it uses as much as digits as its factorization.

40137457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89842.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 40137457 is about 6335.4129305042. The cubic root of 40137457 is about 342.3864883933.

The spelling of 40137457 in words is "forty million, one hundred thirty-seven thousand, four hundred fifty-seven".