74525981 has 6 divisors (see below), whose sum is σ = 75351582. Its totient is φ = 73702200.

The previous prime is 74525963. The next prime is 74526007. The reversal of 74525981 is 18952547.

It can be written as a sum of positive squares in only one way, i.e., 73788100 + 737881 = 8590^2 + 859^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74525981 is a prime.

It is a super-2 number, since 2×74525981² = 11108243688024722, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (100800) is a multiple of the sum of its prime divisors (960).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74525081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86330 + ... + 87188.

It is an arithmetic number, because the mean of its divisors is an integer number (12558597).

Almost surely, 2^74525981 is an apocalyptic number.

It is an amenable number.

74525981 is a deficient number, since it is larger than the sum of its proper divisors (825601).

74525981 is an frugal number, since it uses more digits than its factorization.

74525981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819 (or 960 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 74525981 is about 8632.8431585428. The cubic root of 74525981 is about 420.8260029526.

The spelling of 74525981 in words is "seventy-four million, five hundred twenty-five thousand, nine hundred eighty-one".