1375042257 has 32 divisors (see below), whose sum is σ = 2066688000. Its totient is φ = 903450240.

The previous prime is 1375042247. The next prime is 1375042271. The reversal of 1375042257 is 7522405731.

1375042257 is a `hidden beast` number, since 137 + 50 + 422 + 57 = 666.

It is not a de Polignac number, because 1375042257 - 2⁴ = 1375042241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375042247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 934032 + ... + 935502.

It is an arithmetic number, because the mean of its divisors is an integer number (64584000).

Almost surely, 2^1375042257 is an apocalyptic number.

It is an amenable number.

1375042257 is a deficient number, since it is larger than the sum of its proper divisors (691645743).

1375042257 is a wasteful number, since it uses less digits than its factorization.

1375042257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 1375042257 is about 37081.5622243724. The cubic root of 1375042257 is about 1112.0014365288.

Adding to 1375042257 its reverse (7522405731), we get a palindrome (8897447988).

The spelling of 1375042257 in words is "one billion, three hundred seventy-five million, forty-two thousand, two hundred fifty-seven".