1213561060 has 12 divisors (see below), whose sum is σ = 2548478268. Its totient is φ = 485424416.

The previous prime is 1213561051. The next prime is 1213561081. The reversal of 1213561060 is 601653121.

It can be written as a sum of positive squares in 2 ways, for example, as 467943424 + 745617636 = 21632^2 + 27306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30339007 + ... + 30339046.

It is an arithmetic number, because the mean of its divisors is an integer number (212373189).

Almost surely, 2^1213561060 is an apocalyptic number.

1213561060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213561060 is an abundant number, since it is smaller than the sum of its proper divisors (1334917208).

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

1213561060 is a wasteful number, since it uses less digits than its factorization.

1213561060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60678062 (or 60678060 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1213561060 is about 34836.2032948483. The cubic root of 1213561060 is about 1066.6465775296.

The spelling of 1213561060 in words is "one billion, two hundred thirteen million, five hundred sixty-one thousand, sixty".