1231351296 has 160 divisors (see below), whose sum is σ = 3804185088. Its totient is φ = 346644480.

The previous prime is 1231351291. The next prime is 1231351337. The reversal of 1231351296 is 6921531321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231351291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762586 + ... + 764198.

Almost surely, 2^1231351296 is an apocalyptic number.

1231351296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231351296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902092544).

1231351296 is an abundant number, since it is smaller than the sum of its proper divisors (2572833792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231351296 is an equidigital number, since it uses as much as digits as its factorization.

1231351296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712 (or 1696 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 1231351296 is about 35090.6154975942. The cubic root of 1231351296 is about 1071.8334931112.

The spelling of 1231351296 in words is "one billion, two hundred thirty-one million, three hundred fifty-one thousand, two hundred ninety-six".