15129969 has 4 divisors (see below), whose sum is σ = 20173296. Its totient is φ = 10086644.

The previous prime is 15129941. The next prime is 15129973. The reversal of 15129969 is 96992151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96992151 = 3 ⋅32330717.

It is a cyclic number.

It is not a de Polignac number, because 15129969 - 2⁷ = 15129841 is a prime.

It is a super-2 number, since 2×15129969² = 457831923881922, 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 15129969.

It is not an unprimeable number, because it can be changed into a prime (15125969) 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, 2521659 + ... + 2521664.

It is an arithmetic number, because the mean of its divisors is an integer number (5043324).

Almost surely, 2^15129969 is an apocalyptic number.

It is an amenable number.

15129969 is a deficient number, since it is larger than the sum of its proper divisors (5043327).

15129969 is an equidigital number, since it uses as much as digits as its factorization.

15129969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043326.

The product of its digits is 43740, while the sum is 42.

The square root of 15129969 is about 3889.7260829010. The cubic root of 15129969 is about 247.3314514104.

The spelling of 15129969 in words is "fifteen million, one hundred twenty-nine thousand, nine hundred sixty-nine".