1247274881 has 8 divisors (see below), whose sum is σ = 1271483040. Its totient is φ = 1223231328.

The previous prime is 1247274877. The next prime is 1247274911. The reversal of 1247274881 is 1884727421.

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

It is not a de Polignac number, because 1247274881 - 2² = 1247274877 is a prime.

It is a super-2 number, since 2×1247274881² = 3111389257547128322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247274841) 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, 25796 + ... + 56213.

It is an arithmetic number, because the mean of its divisors is an integer number (158935380).

Almost surely, 2^1247274881 is an apocalyptic number.

It is an amenable number.

1247274881 is a deficient number, since it is larger than the sum of its proper divisors (24208159).

1247274881 is an equidigital number, since it uses as much as digits as its factorization.

1247274881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82303.

The product of its digits is 200704, while the sum is 44.

The square root of 1247274881 is about 35316.7790292376. The cubic root of 1247274881 is about 1076.4339633366.

The spelling of 1247274881 in words is "one billion, two hundred forty-seven million, two hundred seventy-four thousand, eight hundred eighty-one".