15901240 has 32 divisors (see below), whose sum is σ = 35915760. Its totient is φ = 6336000.

The previous prime is 15901229. The next prime is 15901241. The reversal of 15901240 is 4210951.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15901241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12640 + ... + 13840.

Almost surely, 2^15901240 is an apocalyptic number.

15901240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15901240 is an abundant number, since it is smaller than the sum of its proper divisors (20014520).

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

15901240 is a wasteful number, since it uses less digits than its factorization.

15901240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 15901240 is about 3987.6358911014. The cubic root of 15901240 is about 251.4646820675.

The spelling of 15901240 in words is "fifteen million, nine hundred one thousand, two hundred forty".