15720104 has 16 divisors (see below), whose sum is σ = 31209300. Its totient is φ = 7397632.

The previous prime is 15720101. The next prime is 15720167. The reversal of 15720104 is 40102751.

It can be written as a sum of positive squares in 2 ways, for example, as 13675204 + 2044900 = 3698^2 + 1430^2 .

It is not an unprimeable number, because it can be changed into a prime (15720101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57659 + ... + 57930.

Almost surely, 2^15720104 is an apocalyptic number.

It is an amenable number.

15720104 is a deficient number, since it is larger than the sum of its proper divisors (15489196).

15720104 is a wasteful number, since it uses less digits than its factorization.

15720104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115612 (or 115608 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 15720104 is about 3964.8586355632. The cubic root of 15720104 is about 250.5061957052.

Adding to 15720104 its reverse (40102751), we get a palindrome (55822855).

It can be divided in two parts, 157 and 20104, that multiplied together give a triangular number (3156328 = T₂₅₁₂).

The spelling of 15720104 in words is "fifteen million, seven hundred twenty thousand, one hundred four".