1212653020 has 24 divisors (see below), whose sum is σ = 2582441568. Its totient is φ = 478228800.

The previous prime is 1212652999. The next prime is 1212653021. The reversal of 1212653020 is 203562121.

It is a junction number, because it is equal to n+sod(n) for n = 1212652982 and 1212653000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212653021) 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, 425571 + ... + 428410.

It is an arithmetic number, because the mean of its divisors is an integer number (107601732).

Almost surely, 2^1212653020 is an apocalyptic number.

1212653020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212653020 is an abundant number, since it is smaller than the sum of its proper divisors (1369788548).

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

1212653020 is a wasteful number, since it uses less digits than its factorization.

1212653020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854061 (or 854059 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1212653020 is about 34823.1678627893. The cubic root of 1212653020 is about 1066.3804737839.

The spelling of 1212653020 in words is "one billion, two hundred twelve million, six hundred fifty-three thousand, twenty".