74257457 has 2 divisors, whose sum is σ = 74257458. Its totient is φ = 74257456.

The previous prime is 74257451. The next prime is 74257471. The reversal of 74257457 is 75475247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67502656 + 6754801 = 8216^2 + 2599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74257457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74257451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37128728 + 37128729.

It is an arithmetic number, because the mean of its divisors is an integer number (37128729).

Almost surely, 2^74257457 is an apocalyptic number.

It is an amenable number.

74257457 is a deficient number, since it is larger than the sum of its proper divisors (1).

74257457 is an equidigital number, since it uses as much as digits as its factorization.

74257457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274400, while the sum is 41.

The square root of 74257457 is about 8617.2766579703. The cubic root of 74257457 is about 420.3199697046.

The spelling of 74257457 in words is "seventy-four million, two hundred fifty-seven thousand, four hundred fifty-seven".