126317281 has 8 divisors (see below), whose sum is σ = 130846464. Its totient is φ = 121816560.

The previous prime is 126317267. The next prime is 126317309. The reversal of 126317281 is 182713621.

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 126317281 - 2⁵ = 126317249 is a prime.

It is a super-2 number, since 2×126317281² = 31912110958465922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126317221) 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, 2130 + ... + 16036.

It is an arithmetic number, because the mean of its divisors is an integer number (16355808).

Almost surely, 2^126317281 is an apocalyptic number.

It is an amenable number.

126317281 is a deficient number, since it is larger than the sum of its proper divisors (4529183).

126317281 is a wasteful number, since it uses less digits than its factorization.

126317281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14231.

The product of its digits is 4032, while the sum is 31.

The square root of 126317281 is about 11239.0960935477. The cubic root of 126317281 is about 501.7502408319.

The spelling of 126317281 in words is "one hundred twenty-six million, three hundred seventeen thousand, two hundred eighty-one".