74730257 has 8 divisors (see below), whose sum is σ = 85780800. Its totient is φ = 63773424.

The previous prime is 74730251. The next prime is 74730263. The reversal of 74730257 is 75203747.

It is an interprime number because it is at equal distance from previous prime (74730251) and next prime (74730263).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74730257 - 2⁶ = 74730193 is a prime.

It is a super-2 number, since 2×74730257² = 11169222622572098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74730251) 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 in 7 ways as a sum of consecutive naturals, for example, 21707 + ... + 24912.

It is an arithmetic number, because the mean of its divisors is an integer number (10722600).

Almost surely, 2^74730257 is an apocalyptic number.

It is an amenable number.

74730257 is a deficient number, since it is larger than the sum of its proper divisors (11050543).

74730257 is a wasteful number, since it uses less digits than its factorization.

74730257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46855.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 74730257 is about 8644.6663903242. Note that the first 3 decimals coincide. The cubic root of 74730257 is about 421.2101474155.

The spelling of 74730257 in words is "seventy-four million, seven hundred thirty thousand, two hundred fifty-seven".