1260626537 has 2 divisors, whose sum is σ = 1260626538. Its totient is φ = 1260626536.

The previous prime is 1260626533. The next prime is 1260626539. The reversal of 1260626537 is 7356260621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231939801 + 28686736 = 35099^2 + 5356^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260626537 - 2² = 1260626533 is a prime.

It is a super-2 number, since 2×1260626537² = 3178358531577224738, which contains 22 as substring.

Together with 1260626539, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1260626537.

It is not a weakly prime, because it can be changed into another prime (1260626533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630313268 + 630313269.

It is an arithmetic number, because the mean of its divisors is an integer number (630313269).

Almost surely, 2^1260626537 is an apocalyptic number.

It is an amenable number.

1260626537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260626537 is an equidigital number, since it uses as much as digits as its factorization.

1260626537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1260626537 is about 35505.3029419550. The cubic root of 1260626537 is about 1080.2612928025.

The spelling of 1260626537 in words is "one billion, two hundred sixty million, six hundred twenty-six thousand, five hundred thirty-seven".