1264524421 has 2 divisors, whose sum is σ = 1264524422. Its totient is φ = 1264524420.

The previous prime is 1264524407. The next prime is 1264524427. The reversal of 1264524421 is 1244254621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668481025 + 596043396 = 25855^2 + 24414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264524421 - 2⁵ = 1264524389 is a prime.

It is a super-2 number, since 2×1264524421² = 3198044022610770482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264524427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632262210 + 632262211.

It is an arithmetic number, because the mean of its divisors is an integer number (632262211).

Almost surely, 2^1264524421 is an apocalyptic number.

It is an amenable number.

1264524421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264524421 is an equidigital number, since it uses as much as digits as its factorization.

1264524421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 31.

The square root of 1264524421 is about 35560.1521509681. The cubic root of 1264524421 is about 1081.3735441667.

The spelling of 1264524421 in words is "one billion, two hundred sixty-four million, five hundred twenty-four thousand, four hundred twenty-one".