74891261 has 2 divisors, whose sum is σ = 74891262. Its totient is φ = 74891260.

The previous prime is 74891233. The next prime is 74891263. The reversal of 74891261 is 16219847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 155236 = 8645^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 74891261 - 2¹⁸ = 74629117 is a prime.

Together with 74891263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74891263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37445630 + 37445631.

It is an arithmetic number, because the mean of its divisors is an integer number (37445631).

Almost surely, 2^74891261 is an apocalyptic number.

It is an amenable number.

74891261 is a deficient number, since it is larger than the sum of its proper divisors (1).

74891261 is an equidigital number, since it uses as much as digits as its factorization.

74891261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 74891261 is about 8653.9737115385. The cubic root of 74891261 is about 421.5124251302.

The spelling of 74891261 in words is "seventy-four million, eight hundred ninety-one thousand, two hundred sixty-one".