7149855 has 16 divisors (see below), whose sum is σ = 11547360. Its totient is φ = 3777408.

The previous prime is 7149851. The next prime is 7149899. The reversal of 7149855 is 5589417.

It is not a de Polignac number, because 7149855 - 2² = 7149851 is a prime.

It is a super-2 number, since 2×7149855² = 102240853042050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149851) 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 15 ways as a sum of consecutive naturals, for example, 552 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (721710).

Almost surely, 2^7149855 is an apocalyptic number.

7149855 is a deficient number, since it is larger than the sum of its proper divisors (4397505).

7149855 is a wasteful number, since it uses less digits than its factorization.

7149855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490.

The product of its digits is 50400, while the sum is 39.

The square root of 7149855 is about 2673.9212778240. The cubic root of 7149855 is about 192.6485500912.

The spelling of 7149855 in words is "seven million, one hundred forty-nine thousand, eight hundred fifty-five".