7138925 has 6 divisors (see below), whose sum is σ = 8852298. Its totient is φ = 5711120.

The previous prime is 7138919. The next prime is 7138931. The reversal of 7138925 is 5298317.

It is an interprime number because it is at equal distance from previous prime (7138919) and next prime (7138931).

It can be written as a sum of positive squares in 3 ways, for example, as 68644 + 7070281 = 262^2 + 2659^2 .

It is not a de Polignac number, because 7138925 - 2¹⁸ = 6876781 is a prime.

It is a Duffinian number.

It is a congruent 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, 142754 + ... + 142803.

It is an arithmetic number, because the mean of its divisors is an integer number (1475383).

Almost surely, 2^7138925 is an apocalyptic number.

It is an amenable number.

7138925 is a deficient number, since it is larger than the sum of its proper divisors (1713373).

7138925 is a wasteful number, since it uses less digits than its factorization.

7138925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285567 (or 285562 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 7138925 is about 2671.8766812860. The cubic root of 7138925 is about 192.5503325966.

The spelling of 7138925 in words is "seven million, one hundred thirty-eight thousand, nine hundred twenty-five".