15420154 has 8 divisors (see below), whose sum is σ = 23152500. Its totient is φ = 7702656.

The previous prime is 15420151. The next prime is 15420161. The reversal of 15420154 is 45102451.

It can be written as a sum of positive squares in 2 ways, for example, as 13155129 + 2265025 = 3627^2 + 1505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×15420154² = 475562298767432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15420151) 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, 589 + ... + 5584.

Almost surely, 2^15420154 is an apocalyptic number.

15420154 is a deficient number, since it is larger than the sum of its proper divisors (7732346).

15420154 is a wasteful number, since it uses less digits than its factorization.

15420154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 15420154 is about 3926.8503918535. The cubic root of 15420154 is about 248.9026785898.

The spelling of 15420154 in words is "fifteen million, four hundred twenty thousand, one hundred fifty-four".