15012040 has 32 divisors (see below), whose sum is σ = 33929280. Its totient is φ = 5977792.

The previous prime is 15012013. The next prime is 15012043. The reversal of 15012040 is 4021051.

15012040 = T₄₃₉ + T₄₄₀ + ... + T₅₅₈.

It is a super-2 number, since 2×15012040² = 450722689923200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15012040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15012043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9807 + ... + 11233.

It is an arithmetic number, because the mean of its divisors is an integer number (1060290).

Almost surely, 2^15012040 is an apocalyptic number.

15012040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15012040 is an abundant number, since it is smaller than the sum of its proper divisors (18917240).

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

15012040 is a wasteful number, since it uses less digits than its factorization.

15012040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 15012040 is about 3874.5373917411. The cubic root of 15012040 is about 246.6871746605.

Adding to 15012040 its reverse (4021051), we get a palindrome (19033091).

The spelling of 15012040 in words is "fifteen million, twelve thousand, forty".