404552261 has 2 divisors, whose sum is σ = 404552262. Its totient is φ = 404552260.

The previous prime is 404552257. The next prime is 404552279. The reversal of 404552261 is 162255404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331021636 + 73530625 = 18194^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 404552261 - 2² = 404552257 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404552251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202276130 + 202276131.

It is an arithmetic number, because the mean of its divisors is an integer number (202276131).

Almost surely, 2^404552261 is an apocalyptic number.

It is an amenable number.

404552261 is a deficient number, since it is larger than the sum of its proper divisors (1).

404552261 is an equidigital number, since it uses as much as digits as its factorization.

404552261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 404552261 is about 20113.4845563865. The cubic root of 404552261 is about 739.5908750168.

The spelling of 404552261 in words is "four hundred four million, five hundred fifty-two thousand, two hundred sixty-one".