1264289137 has 2 divisors, whose sum is σ = 1264289138. Its totient is φ = 1264289136.

The previous prime is 1264289071. The next prime is 1264289177. The reversal of 1264289137 is 7319824621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1255710096 + 8579041 = 35436^2 + 2929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264289137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1264289093 and 1264289102.

It is not a weakly prime, because it can be changed into another prime (1264289177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632144568 + 632144569.

It is an arithmetic number, because the mean of its divisors is an integer number (632144569).

Almost surely, 2^1264289137 is an apocalyptic number.

It is an amenable number.

1264289137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264289137 is an equidigital number, since it uses as much as digits as its factorization.

1264289137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 1264289137 is about 35556.8437435046. The cubic root of 1264289137 is about 1081.3064713420.

The spelling of 1264289137 in words is "one billion, two hundred sixty-four million, two hundred eighty-nine thousand, one hundred thirty-seven".