15142391 has 8 divisors (see below), whose sum is σ = 16619904. Its totient is φ = 13681720.

The previous prime is 15142381. The next prime is 15142399. The reversal of 15142391 is 19324151.

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 15142391 - 2⁶ = 15142327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15142391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15142399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2285 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (2077488).

Almost surely, 2^15142391 is an apocalyptic number.

15142391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15142391 is a deficient number, since it is larger than the sum of its proper divisors (1477513).

15142391 is a wasteful number, since it uses less digits than its factorization.

15142391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8421.

The product of its digits is 1080, while the sum is 26.

The square root of 15142391 is about 3891.3225258259. The cubic root of 15142391 is about 247.3991208783.

The spelling of 15142391 in words is "fifteen million, one hundred forty-two thousand, three hundred ninety-one".