1321425612 has 36 divisors (see below), whose sum is σ = 3597215440. Its totient is φ = 406592352.

The previous prime is 1321425607. The next prime is 1321425617. The reversal of 1321425612 is 2165241231.

1321425612 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 42 + 5 + 612 = 666.

It is an interprime number because it is at equal distance from previous prime (1321425607) and next prime (1321425617).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1321425617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411312 + ... + 1412247.

Almost surely, 2^1321425612 is an apocalyptic number.

1321425612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321425612 is an abundant number, since it is smaller than the sum of its proper divisors (2275789828).

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

1321425612 is a wasteful number, since it uses less digits than its factorization.

1321425612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823582 (or 2823577 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1321425612 is about 36351.4182942014. The cubic root of 1321425612 is about 1097.3560777991.

Adding to 1321425612 its reverse (2165241231), we get a palindrome (3486666843).

The spelling of 1321425612 in words is "one billion, three hundred twenty-one million, four hundred twenty-five thousand, six hundred twelve".