7125387 has 8 divisors (see below), whose sum is σ = 9828240. Its totient is φ = 4586400.

The previous prime is 7125379. The next prime is 7125407. The reversal of 7125387 is 7835217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7125387 - 2³ = 7125379 is a prime.

It is a super-2 number, since 2×7125387² = 101542279799538, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7125387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7125337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40864 + ... + 41037.

It is an arithmetic number, because the mean of its divisors is an integer number (1228530).

Almost surely, 2^7125387 is an apocalyptic number.

7125387 is a deficient number, since it is larger than the sum of its proper divisors (2702853).

7125387 is a wasteful number, since it uses less digits than its factorization.

7125387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81933.

The product of its digits is 11760, while the sum is 33.

The square root of 7125387 is about 2669.3420537653. The cubic root of 7125387 is about 192.4285404071.

The spelling of 7125387 in words is "seven million, one hundred twenty-five thousand, three hundred eighty-seven".