7149975 has 24 divisors (see below), whose sum is σ = 13511040. Its totient is φ = 3268320.

The previous prime is 7149971. The next prime is 7149983. The reversal of 7149975 is 5799417.

It is a happy number.

7149975 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7149975 - 2² = 7149971 is a prime.

It is a super-2 number, since 2×7149975² = 102244285001250, which contains 22 as substring.

It is an Ulam number.

7149975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149971) 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 23 ways as a sum of consecutive naturals, for example, 6285 + ... + 7334.

It is an arithmetic number, because the mean of its divisors is an integer number (562960).

Almost surely, 2^7149975 is an apocalyptic number.

7149975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7149975 is a deficient number, since it is larger than the sum of its proper divisors (6361065).

7149975 is a wasteful number, since it uses less digits than its factorization.

7149975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639 (or 13634 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 7149975 is about 2673.9437166852. The cubic root of 7149975 is about 192.6496278612.

The spelling of 7149975 in words is "seven million, one hundred forty-nine thousand, nine hundred seventy-five".