7149540 has 24 divisors (see below), whose sum is σ = 20018880. Its totient is φ = 1906528.

The previous prime is 7149533. The next prime is 7149551. The reversal of 7149540 is 459417.

It is a happy number.

It is a super-2 number, since 2×7149540² = 102231844423200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7149498 and 7149507.

It is an unprimeable number.

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, 59520 + ... + 59639.

It is an arithmetic number, because the mean of its divisors is an integer number (834120).

Almost surely, 2^7149540 is an apocalyptic number.

It is an amenable number.

7149540 is an abundant number, since it is smaller than the sum of its proper divisors (12869340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7149540 is a wasteful number, since it uses less digits than its factorization.

7149540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119171 (or 119169 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 7149540 is about 2673.8623749176. The cubic root of 7149540 is about 192.6457208877.

The spelling of 7149540 in words is "seven million, one hundred forty-nine thousand, five hundred forty".