1202120520 has 32 divisors (see below), whose sum is σ = 3606361920. Its totient is φ = 320565440.

The previous prime is 1202120509. The next prime is 1202120531. The reversal of 1202120520 is 250212021.

It is an interprime number because it is at equal distance from previous prime (1202120509) and next prime (1202120531).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1202120520.

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, 5008716 + ... + 5008955.

It is an arithmetic number, because the mean of its divisors is an integer number (112698810).

Almost surely, 2^1202120520 is an apocalyptic number.

1202120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202120520 is an abundant number, since it is smaller than the sum of its proper divisors (2404241400).

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

1202120520 is a wasteful number, since it uses less digits than its factorization.

1202120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10017685 (or 10017681 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1202120520 is about 34671.6097116935. The cubic root of 1202120520 is about 1063.2841421630.

Adding to 1202120520 its reverse (250212021), we get a palindrome (1452332541).

The spelling of 1202120520 in words is "one billion, two hundred two million, one hundred twenty thousand, five hundred twenty".