156241121 has 8 divisors (see below), whose sum is σ = 160908264. Its totient is φ = 151597440.

The previous prime is 156241103. The next prime is 156241133. The reversal of 156241121 is 121142651.

It can be written as a sum of positive squares in 4 ways, for example, as 22515025 + 133726096 = 4745^2 + 11564^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156241121 is a prime.

It is a super-2 number, since 2×156241121² = 48822575782673282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156240121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8141 + ... + 19461.

It is an arithmetic number, because the mean of its divisors is an integer number (20113533).

Almost surely, 2^156241121 is an apocalyptic number.

It is an amenable number.

156241121 is a deficient number, since it is larger than the sum of its proper divisors (4667143).

156241121 is a wasteful number, since it uses less digits than its factorization.

156241121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11731.

The product of its digits is 480, while the sum is 23.

The square root of 156241121 is about 12499.6448349543. The cubic root of 156241121 is about 538.5984700611.

Adding to 156241121 its reverse (121142651), we get a palindrome (277383772).

The spelling of 156241121 in words is "one hundred fifty-six million, two hundred forty-one thousand, one hundred twenty-one".