1375121425 has 6 divisors (see below), whose sum is σ = 1705150598. Its totient is φ = 1100097120.

The previous prime is 1375121399. The next prime is 1375121443. The reversal of 1375121425 is 5241215731.

It can be written as a sum of positive squares in 3 ways, for example, as 11370384 + 1363751041 = 3372^2 + 36929^2 .

It is not a de Polignac number, because 1375121425 - 2⁹ = 1375120913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27502404 + ... + 27502453.

Almost surely, 2^1375121425 is an apocalyptic number.

It is an amenable number.

1375121425 is a deficient number, since it is larger than the sum of its proper divisors (330029173).

1375121425 is an equidigital number, since it uses as much as digits as its factorization.

1375121425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55004867 (or 55004862 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 1375121425 is about 37082.6296936989. The cubic root of 1375121425 is about 1112.0227772645.

The spelling of 1375121425 in words is "one billion, three hundred seventy-five million, one hundred twenty-one thousand, four hundred twenty-five".