74985751 has 4 divisors (see below), whose sum is σ = 75713872. Its totient is φ = 74257632.

The previous prime is 74985749. The next prime is 74985763. The reversal of 74985751 is 15758947.

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: 15758947 = 71 ⋅221957.

It is a cyclic number.

It is not a de Polignac number, because 74985751 - 2¹ = 74985749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74985551) 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, 363906 + ... + 364111.

It is an arithmetic number, because the mean of its divisors is an integer number (18928468).

Almost surely, 2^74985751 is an apocalyptic number.

74985751 is a deficient number, since it is larger than the sum of its proper divisors (728121).

74985751 is a wasteful number, since it uses less digits than its factorization.

74985751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728120.

The product of its digits is 352800, while the sum is 46.

The square root of 74985751 is about 8659.4313323682. The cubic root of 74985751 is about 421.6896241326.

The spelling of 74985751 in words is "seventy-four million, nine hundred eighty-five thousand, seven hundred fifty-one".