74343257 has 6 divisors (see below), whose sum is σ = 78462378. Its totient is φ = 70430112.

The previous prime is 74343233. The next prime is 74343263. The reversal of 74343257 is 75234347.

It can be written as a sum of positive squares in only one way, i.e., 47831056 + 26512201 = 6916^2 + 5149^2 .

It is not a de Polignac number, because 74343257 - 2¹⁸ = 74081113 is a prime.

It is a super-2 number, since 2×74343257² = 11053839722736098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74343287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102608 + ... + 103329.

It is an arithmetic number, because the mean of its divisors is an integer number (13077063).

Almost surely, 2^74343257 is an apocalyptic number.

It is an amenable number.

74343257 is a deficient number, since it is larger than the sum of its proper divisors (4119121).

74343257 is a wasteful number, since it uses less digits than its factorization.

74343257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205975 (or 205956 counting only the distinct ones).

The product of its digits is 70560, while the sum is 35.

The square root of 74343257 is about 8622.2535917241. The cubic root of 74343257 is about 420.4817921624.

The spelling of 74343257 in words is "seventy-four million, three hundred forty-three thousand, two hundred fifty-seven".