156162121 has 8 divisors (see below), whose sum is σ = 165678080. Its totient is φ = 146775888.

The previous prime is 156162109. The next prime is 156162131. The reversal of 156162121 is 121261651.

It is a happy number.

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 156162121 - 2²¹ = 154064969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156162101) 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 in 7 ways as a sum of consecutive naturals, for example, 29946 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (20709760).

Almost surely, 2^156162121 is an apocalyptic number.

It is an amenable number.

156162121 is a deficient number, since it is larger than the sum of its proper divisors (9515959).

156162121 is a wasteful number, since it uses less digits than its factorization.

156162121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64863.

The product of its digits is 720, while the sum is 25.

The square root of 156162121 is about 12496.4843456070. The cubic root of 156162121 is about 538.5076778030.

The spelling of 156162121 in words is "one hundred fifty-six million, one hundred sixty-two thousand, one hundred twenty-one".