1264065437 has 2 divisors, whose sum is σ = 1264065438. Its totient is φ = 1264065436.

The previous prime is 1264065433. The next prime is 1264065457. The reversal of 1264065437 is 7345604621.

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., 1106161081 + 157904356 = 33259^2 + 12566^2 .

It is an emirp because it is prime and its reverse (7345604621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264065437 - 2² = 1264065433 is a prime.

It is a super-2 number, since 2×1264065437² = 3195722858036001938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1264065437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264065433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632032718 + 632032719.

It is an arithmetic number, because the mean of its divisors is an integer number (632032719).

Almost surely, 2^1264065437 is an apocalyptic number.

It is an amenable number.

1264065437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264065437 is an equidigital number, since it uses as much as digits as its factorization.

1264065437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 1264065437 is about 35553.6979370642. The cubic root of 1264065437 is about 1081.2426930710.

The spelling of 1264065437 in words is "one billion, two hundred sixty-four million, sixty-five thousand, four hundred thirty-seven".