456475981 has 8 divisors (see below), whose sum is σ = 491813784. Its totient is φ = 421170240.

The previous prime is 456475939. The next prime is 456475991. The reversal of 456475981 is 189574654.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2402500 + 454073481 = 1550^2 + 21309^2 .

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 456475981 - 2⁷ = 456475853 is a prime.

It is a super-2 number, since 2×456475981² = 416740642459824722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (456475991) 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, 27375 + ... + 40771.

It is an arithmetic number, because the mean of its divisors is an integer number (61476723).

Almost surely, 2^456475981 is an apocalyptic number.

It is an amenable number.

456475981 is a deficient number, since it is larger than the sum of its proper divisors (35337803).

456475981 is a wasteful number, since it uses less digits than its factorization.

456475981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16031.

The product of its digits is 1209600, while the sum is 49.

The square root of 456475981 is about 21365.2985235405. The cubic root of 456475981 is about 769.9679421072.

The spelling of 456475981 in words is "four hundred fifty-six million, four hundred seventy-five thousand, nine hundred eighty-one".