15402161 has 8 divisors (see below), whose sum is σ = 16173120. Its totient is φ = 14647248.

The previous prime is 15402143. The next prime is 15402193. The reversal of 15402161 is 16120451.

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

It is a cyclic number.

It is not a de Polignac number, because 15402161 - 2⁶ = 15402097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15402461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 5906.

It is an arithmetic number, because the mean of its divisors is an integer number (2021640).

Almost surely, 2^15402161 is an apocalyptic number.

It is an amenable number.

15402161 is a deficient number, since it is larger than the sum of its proper divisors (770959).

15402161 is an equidigital number, since it uses as much as digits as its factorization.

15402161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 15402161 is about 3924.5587013064. The cubic root of 15402161 is about 248.8058302501.

The spelling of 15402161 in words is "fifteen million, four hundred two thousand, one hundred sixty-one".