15142991 has 2 divisors, whose sum is σ = 15142992. Its totient is φ = 15142990.

The previous prime is 15142987. The next prime is 15143033. The reversal of 15142991 is 19924151.

15142991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15142991 - 2² = 15142987 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15142921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7571495 + 7571496.

It is an arithmetic number, because the mean of its divisors is an integer number (7571496).

Almost surely, 2^15142991 is an apocalyptic number.

15142991 is a deficient number, since it is larger than the sum of its proper divisors (1).

15142991 is an equidigital number, since it uses as much as digits as its factorization.

15142991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 32.

The square root of 15142991 is about 3891.3996196741. The cubic root of 15142991 is about 247.4023884713.

The spelling of 15142991 in words is "fifteen million, one hundred forty-two thousand, nine hundred ninety-one".