264669421 has 2 divisors, whose sum is σ = 264669422. Its totient is φ = 264669420.

The previous prime is 264669409. The next prime is 264669451. The reversal of 264669421 is 124966462.

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., 261468900 + 3200521 = 16170^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 264669421 - 2²¹ = 262572269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264669401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132334710 + 132334711.

It is an arithmetic number, because the mean of its divisors is an integer number (132334711).

Almost surely, 2^264669421 is an apocalyptic number.

It is an amenable number.

264669421 is a deficient number, since it is larger than the sum of its proper divisors (1).

264669421 is an equidigital number, since it uses as much as digits as its factorization.

264669421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 264669421 is about 16268.6637742625. The cubic root of 264669421 is about 642.0486282527.

The spelling of 264669421 in words is "two hundred sixty-four million, six hundred sixty-nine thousand, four hundred twenty-one".