15142251 has 4 divisors (see below), whose sum is σ = 20189672. Its totient is φ = 10094832.

The previous prime is 15142249. The next prime is 15142273. The reversal of 15142251 is 15224151.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15142251 - 2¹ = 15142249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15142051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523706 + ... + 2523711.

It is an arithmetic number, because the mean of its divisors is an integer number (5047418).

Almost surely, 2^15142251 is an apocalyptic number.

15142251 is a deficient number, since it is larger than the sum of its proper divisors (5047421).

15142251 is an equidigital number, since it uses as much as digits as its factorization.

15142251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047420.

The product of its digits is 400, while the sum is 21.

The square root of 15142251 is about 3891.3045370415. The cubic root of 15142251 is about 247.3983584275.

The spelling of 15142251 in words is "fifteen million, one hundred forty-two thousand, two hundred fifty-one".