1265897233 has 2 divisors, whose sum is σ = 1265897234. Its totient is φ = 1265897232.

The previous prime is 1265897203. The next prime is 1265897273. The reversal of 1265897233 is 3327985621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1098789904 + 167107329 = 33148^2 + 12927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265897233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265897203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632948616 + 632948617.

It is an arithmetic number, because the mean of its divisors is an integer number (632948617).

Almost surely, 2^1265897233 is an apocalyptic number.

It is an amenable number.

1265897233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265897233 is an equidigital number, since it uses as much as digits as its factorization.

1265897233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 1265897233 is about 35579.4495882103. The cubic root of 1265897233 is about 1081.7647283043.

It can be divided in two parts, 12 and 65897233, that multiplied together give a triangular number (790766796 = T₃₉₇₆₈).

The spelling of 1265897233 in words is "one billion, two hundred sixty-five million, eight hundred ninety-seven thousand, two hundred thirty-three".