74453257 has 4 divisors (see below), whose sum is σ = 74501140. Its totient is φ = 74405376.

The previous prime is 74453243. The next prime is 74453273. The reversal of 74453257 is 75235447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75235447 = 7 ⋅10747921.

It can be written as a sum of positive squares in 2 ways, for example, as 54597321 + 19855936 = 7389^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 74453257 - 2⁷ = 74453129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74453207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21528 + ... + 24745.

It is an arithmetic number, because the mean of its divisors is an integer number (18625285).

Almost surely, 2^74453257 is an apocalyptic number.

It is an amenable number.

74453257 is a deficient number, since it is larger than the sum of its proper divisors (47883).

74453257 is a wasteful number, since it uses less digits than its factorization.

74453257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47882.

The product of its digits is 117600, while the sum is 37.

The square root of 74453257 is about 8628.6300766692. The cubic root of 74453257 is about 420.6890748194.

The spelling of 74453257 in words is "seventy-four million, four hundred fifty-three thousand, two hundred fifty-seven".