1373561725 has 36 divisors (see below), whose sum is σ = 1791649216. Its totient is φ = 1044505440.

The previous prime is 1373561711. The next prime is 1373561729. The reversal of 1373561725 is 5271653731.

It is a happy number.

It is not a de Polignac number, because 1373561725 - 2²⁵ = 1340007293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373561729) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3742492 + ... + 3742858.

Almost surely, 2^1373561725 is an apocalyptic number.

It is an amenable number.

1373561725 is a deficient number, since it is larger than the sum of its proper divisors (418087491).

1373561725 is a wasteful number, since it uses less digits than its factorization.

1373561725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 678 counting only the distinct ones).

The product of its digits is 132300, while the sum is 40.

The square root of 1373561725 is about 37061.5936651407. The cubic root of 1373561725 is about 1111.6021894167.

The spelling of 1373561725 in words is "one billion, three hundred seventy-three million, five hundred sixty-one thousand, seven hundred twenty-five".