74191457 has 4 divisors (see below), whose sum is σ = 74757936. Its totient is φ = 73624980.

The previous prime is 74191441. The next prime is 74191487. The reversal of 74191457 is 75419147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75419147 = 73 ⋅1033139.

It is a cyclic number.

It is not a de Polignac number, because 74191457 - 2⁴ = 74191441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74191457.

It is not an unprimeable number, because it can be changed into a prime (74191487) 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, 283043 + ... + 283304.

It is an arithmetic number, because the mean of its divisors is an integer number (18689484).

Almost surely, 2^74191457 is an apocalyptic number.

It is an amenable number.

74191457 is a deficient number, since it is larger than the sum of its proper divisors (566479).

74191457 is a wasteful number, since it uses less digits than its factorization.

74191457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566478.

The product of its digits is 35280, while the sum is 38.

The square root of 74191457 is about 8613.4462905390. The cubic root of 74191457 is about 420.1954060493.

The spelling of 74191457 in words is "seventy-four million, one hundred ninety-one thousand, four hundred fifty-seven".