1215325420 has 12 divisors (see below), whose sum is σ = 2552183424. Its totient is φ = 486130160.

The previous prime is 1215325409. The next prime is 1215325429. The reversal of 1215325420 is 245235121.

It is not an unprimeable number, because it can be changed into a prime (1215325429) 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 3 ways as a sum of consecutive naturals, for example, 30383116 + ... + 30383155.

It is an arithmetic number, because the mean of its divisors is an integer number (212681952).

Almost surely, 2^1215325420 is an apocalyptic number.

1215325420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215325420 is an abundant number, since it is smaller than the sum of its proper divisors (1336858004).

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

1215325420 is a wasteful number, since it uses less digits than its factorization.

1215325420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60766280 (or 60766278 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1215325420 is about 34861.5177523871. The cubic root of 1215325420 is about 1067.1632490339.

It can be divided in two parts, 12153 and 25420, that added together give a palindrome (37573).

The spelling of 1215325420 in words is "one billion, two hundred fifteen million, three hundred twenty-five thousand, four hundred twenty".