15406142 has 4 divisors (see below), whose sum is σ = 23109216. Its totient is φ = 7703070.

The previous prime is 15406133. The next prime is 15406147. The reversal of 15406142 is 24160451.

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

It is a super-2 number, since 2×15406142² = 474698422648328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15406147) 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 as a sum of consecutive naturals, namely, 3851534 + ... + 3851537.

It is an arithmetic number, because the mean of its divisors is an integer number (5777304).

Almost surely, 2^15406142 is an apocalyptic number.

15406142 is a deficient number, since it is larger than the sum of its proper divisors (7703074).

15406142 is an equidigital number, since it uses as much as digits as its factorization.

15406142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7703073.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 15406142 is about 3925.0658593201. The cubic root of 15406142 is about 248.8272647030.

Adding to 15406142 its reverse (24160451), we get a palindrome (39566593).

The spelling of 15406142 in words is "fifteen million, four hundred six thousand, one hundred forty-two".