40170457 has 2 divisors, whose sum is σ = 40170458. Its totient is φ = 40170456.

The previous prime is 40170437. The next prime is 40170461. The reversal of 40170457 is 75407104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39702601 + 467856 = 6301^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 40170457 - 2¹⁹ = 39646169 is a prime.

It is a super-2 number, since 2×40170457² = 3227331231177698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40170407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20085228 + 20085229.

It is an arithmetic number, because the mean of its divisors is an integer number (20085229).

Almost surely, 2^40170457 is an apocalyptic number.

It is an amenable number.

40170457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40170457 is an equidigital number, since it uses as much as digits as its factorization.

40170457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 40170457 is about 6338.0168033857. The cubic root of 40170457 is about 342.4802965204.

The spelling of 40170457 in words is "forty million, one hundred seventy thousand, four hundred fifty-seven".