74845261 has 2 divisors, whose sum is σ = 74845262. Its totient is φ = 74845260.

The previous prime is 74845249. The next prime is 74845279. The reversal of 74845261 is 16254847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74046025 + 799236 = 8605^2 + 894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74845261 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74845261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74848261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37422630 + 37422631.

It is an arithmetic number, because the mean of its divisors is an integer number (37422631).

Almost surely, 2^74845261 is an apocalyptic number.

It is an amenable number.

74845261 is a deficient number, since it is larger than the sum of its proper divisors (1).

74845261 is an equidigital number, since it uses as much as digits as its factorization.

74845261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 74845261 is about 8651.3155646988. The cubic root of 74845261 is about 421.4261064574.

The spelling of 74845261 in words is "seventy-four million, eight hundred forty-five thousand, two hundred sixty-one".