74138261 has 4 divisors (see below), whose sum is σ = 75076800. Its totient is φ = 73199724.

The previous prime is 74138243. The next prime is 74138287. The reversal of 74138261 is 16283147.

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.

It is a cyclic number.

It is not a de Polignac number, because 74138261 - 2²² = 69943957 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 (74138201) 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, 469151 + ... + 469308.

It is an arithmetic number, because the mean of its divisors is an integer number (18769200).

Almost surely, 2^74138261 is an apocalyptic number.

It is an amenable number.

74138261 is a deficient number, since it is larger than the sum of its proper divisors (938539).

74138261 is an equidigital number, since it uses as much as digits as its factorization.

74138261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938538.

The product of its digits is 8064, while the sum is 32.

The square root of 74138261 is about 8610.3577742159. The cubic root of 74138261 is about 420.0949539657.

The spelling of 74138261 in words is "seventy-four million, one hundred thirty-eight thousand, two hundred sixty-one".