1390191925 has 24 divisors (see below), whose sum is σ = 1777207680. Its totient is φ = 1078243200.

The previous prime is 1390191917. The next prime is 1390191973. The reversal of 1390191925 is 5291910931.

It is not a de Polignac number, because 1390191925 - 2³ = 1390191917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101220 + ... + 114130.

It is an arithmetic number, because the mean of its divisors is an integer number (74050320).

Almost surely, 2^1390191925 is an apocalyptic number.

It is an amenable number.

1390191925 is a deficient number, since it is larger than the sum of its proper divisors (387015755).

1390191925 is a wasteful number, since it uses less digits than its factorization.

1390191925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053 (or 13048 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1390191925 is about 37285.2775904914. The cubic root of 1390191925 is about 1116.0703925336.

The spelling of 1390191925 in words is "one billion, three hundred ninety million, one hundred ninety-one thousand, nine hundred twenty-five".