264421457 has 2 divisors, whose sum is σ = 264421458. Its totient is φ = 264421456.

The previous prime is 264421447. The next prime is 264421481. The reversal of 264421457 is 754124462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193794241 + 70627216 = 13921^2 + 8404^2 .

It is a cyclic number.

It is not a de Polignac number, because 264421457 - 2⁶ = 264421393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264421427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132210728 + 132210729.

It is an arithmetic number, because the mean of its divisors is an integer number (132210729).

Almost surely, 2^264421457 is an apocalyptic number.

It is an amenable number.

264421457 is a deficient number, since it is larger than the sum of its proper divisors (1).

264421457 is an equidigital number, since it uses as much as digits as its factorization.

264421457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 264421457 is about 16261.0410798325. The cubic root of 264421457 is about 641.8480576817.

The spelling of 264421457 in words is "two hundred sixty-four million, four hundred twenty-one thousand, four hundred fifty-seven".