156428281 has 8 divisors (see below), whose sum is σ = 163088640. Its totient is φ = 149905392.

The previous prime is 156428249. The next prime is 156428309. The reversal of 156428281 is 182824651.

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 156428281 - 2⁵ = 156428249 is a prime.

It is a super-2 number, since 2×156428281² = 48939614193229922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156428281.

It is not an unprimeable number, because it can be changed into a prime (156422281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32041 + ... + 36598.

It is an arithmetic number, because the mean of its divisors is an integer number (20386080).

Almost surely, 2^156428281 is an apocalyptic number.

It is an amenable number.

156428281 is a deficient number, since it is larger than the sum of its proper divisors (6660359).

156428281 is an equidigital number, since it uses as much as digits as its factorization.

156428281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68735.

The product of its digits is 30720, while the sum is 37.

The square root of 156428281 is about 12507.1292069763. The cubic root of 156428281 is about 538.8134451905.

The spelling of 156428281 in words is "one hundred fifty-six million, four hundred twenty-eight thousand, two hundred eighty-one".