1375751257 has 2 divisors, whose sum is σ = 1375751258. Its totient is φ = 1375751256.

The previous prime is 1375751227. The next prime is 1375751261. The reversal of 1375751257 is 7521575731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1374629776 + 1121481 = 37076^2 + 1059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375751257 is a prime.

It is a super-2 number, since 2×1375751257² = 3785383042274160098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1375751227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687875628 + 687875629.

It is an arithmetic number, because the mean of its divisors is an integer number (687875629).

Almost surely, 2^1375751257 is an apocalyptic number.

It is an amenable number.

1375751257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375751257 is an equidigital number, since it uses as much as digits as its factorization.

1375751257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 257250, while the sum is 43.

The square root of 1375751257 is about 37091.1209995061. The cubic root of 1375751257 is about 1112.1925272745.

The spelling of 1375751257 in words is "one billion, three hundred seventy-five million, seven hundred fifty-one thousand, two hundred fifty-seven".