1213426560 has 64 divisors (see below), whose sum is σ = 3867803280. Its totient is φ = 323579904.

The previous prime is 1213426559. The next prime is 1213426567. The reversal of 1213426560 is 656243121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213426567) 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, 314077 + ... + 317916.

Almost surely, 2^1213426560 is an apocalyptic number.

1213426560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213426560 is an abundant number, since it is smaller than the sum of its proper divisors (2654376720).

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

1213426560 is an equidigital number, since it uses as much as digits as its factorization.

1213426560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632015 (or 632003 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1213426560 is about 34834.2727784003. The cubic root of 1213426560 is about 1066.6071702926.

Adding to 1213426560 its reverse (656243121), we get a palindrome (1869669681).

The spelling of 1213426560 in words is "one billion, two hundred thirteen million, four hundred twenty-six thousand, five hundred sixty".