15091901 has 4 divisors (see below), whose sum is σ = 16463904. Its totient is φ = 13719900.

The previous prime is 15091891. The next prime is 15091931. The reversal of 15091901 is 10919051.

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.

It is a cyclic number.

It is not a de Polignac number, because 15091901 - 2¹⁰ = 15090877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15091931) 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 3 ways as a sum of consecutive naturals, for example, 685985 + ... + 686006.

It is an arithmetic number, because the mean of its divisors is an integer number (4115976).

Almost surely, 2^15091901 is an apocalyptic number.

15091901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15091901 is a deficient number, since it is larger than the sum of its proper divisors (1372003).

15091901 is a wasteful number, since it uses less digits than its factorization.

15091901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372002.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 15091901 is about 3884.8295972925. The cubic root of 15091901 is about 247.1238431122.

The spelling of 15091901 in words is "fifteen million, ninety-one thousand, nine hundred one".