1213870450 has 48 divisors (see below), whose sum is σ = 2455217856. Its totient is φ = 443822400.

The previous prime is 1213870447. The next prime is 1213870453. The reversal of 1213870450 is 540783121.

It is an interprime number because it is at equal distance from previous prime (1213870447) and next prime (1213870453).

It is not an unprimeable number, because it can be changed into a prime (1213870453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57885 + ... + 76015.

It is an arithmetic number, because the mean of its divisors is an integer number (51150372).

Almost surely, 2^1213870450 is an apocalyptic number.

1213870450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213870450 is an abundant number, since it is smaller than the sum of its proper divisors (1241347406).

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

1213870450 is a wasteful number, since it uses less digits than its factorization.

1213870450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18259 (or 18254 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1213870450 is about 34840.6436507709. The cubic root of 1213870450 is about 1066.7372148435.

The spelling of 1213870450 in words is "one billion, two hundred thirteen million, eight hundred seventy thousand, four hundred fifty".