1212492520 has 32 divisors (see below), whose sum is σ = 2737842120. Its totient is φ = 483266560.

The previous prime is 1212492517. The next prime is 1212492557. The reversal of 1212492520 is 252942121.

It can be written as a sum of positive squares in 4 ways, for example, as 1211179204 + 1313316 = 34802^2 + 1146^2 .

It is a super-2 number, since 2×1212492520² = 2940276222111900800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42697 + ... + 65176.

Almost surely, 2^1212492520 is an apocalyptic number.

1212492520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212492520 is an abundant number, since it is smaller than the sum of its proper divisors (1525349600).

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

1212492520 is a wasteful number, since it uses less digits than its factorization.

1212492520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108165 (or 108161 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1212492520 is about 34820.8632862541. The cubic root of 1212492520 is about 1066.3334249813. Note that the first 3 decimals are identical.

The spelling of 1212492520 in words is "one billion, two hundred twelve million, four hundred ninety-two thousand, five hundred twenty".