15142887 has 6 divisors (see below), whose sum is σ = 21873072. Its totient is φ = 10095252.

The previous prime is 15142877. The next prime is 15142889. The reversal of 15142887 is 78824151.

15142887 is a `hidden beast` number, since 151 + 428 + 87 = 666.

It is not a de Polignac number, because 15142887 - 2¹⁹ = 14618599 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15142889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 841263 + ... + 841280.

It is an arithmetic number, because the mean of its divisors is an integer number (3645512).

Almost surely, 2^15142887 is an apocalyptic number.

15142887 is a deficient number, since it is larger than the sum of its proper divisors (6730185).

15142887 is a wasteful number, since it uses less digits than its factorization.

15142887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682549 (or 1682546 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 15142887 is about 3891.3862568499. The cubic root of 15142887 is about 247.4018220947.

The spelling of 15142887 in words is "fifteen million, one hundred forty-two thousand, eight hundred eighty-seven".