74249181 has 6 divisors (see below), whose sum is σ = 107248830. Its totient is φ = 49499448.

The previous prime is 74249171. The next prime is 74249191. The reversal of 74249181 is 18194247.

It is an interprime number because it is at equal distance from previous prime (74249171) and next prime (74249191).

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 2576025 = 8466^2 + 1605^2 .

It is not a de Polignac number, because 74249181 - 2⁷ = 74249053 is a prime.

It is a super-2 number, since 2×74249181² = 11025881758341522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74249101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4124946 + ... + 4124963.

It is an arithmetic number, because the mean of its divisors is an integer number (17874805).

Almost surely, 2^74249181 is an apocalyptic number.

It is an amenable number.

74249181 is a deficient number, since it is larger than the sum of its proper divisors (32999649).

74249181 is a wasteful number, since it uses less digits than its factorization.

74249181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249915 (or 8249912 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 74249181 is about 8616.7964464759. The cubic root of 74249181 is about 420.3043542255.

The spelling of 74249181 in words is "seventy-four million, two hundred forty-nine thousand, one hundred eighty-one".