15149891 has 8 divisors (see below), whose sum is σ = 15524784. Its totient is φ = 14778400.

The previous prime is 15149887. The next prime is 15149969. The reversal of 15149891 is 19894151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15149891 - 2² = 15149887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15149831) by changing a digit.

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, 9716 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (1940598).

Almost surely, 2^15149891 is an apocalyptic number.

15149891 is a deficient number, since it is larger than the sum of its proper divisors (374893).

15149891 is a wasteful number, since it uses less digits than its factorization.

15149891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its digits is 12960, while the sum is 38.

The square root of 15149891 is about 3892.2860891769. The cubic root of 15149891 is about 247.4399595884.

The spelling of 15149891 in words is "fifteen million, one hundred forty-nine thousand, eight hundred ninety-one".