1203402120 has 64 divisors (see below), whose sum is σ = 3822577920. Its totient is φ = 302029824.

The previous prime is 1203402071. The next prime is 1203402121. The reversal of 1203402120 is 212043021.

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 1203402120.

It is not an unprimeable number, because it can be changed into a prime (1203402121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292912 + ... + 296991.

It is an arithmetic number, because the mean of its divisors is an integer number (59727780).

Almost surely, 2^1203402120 is an apocalyptic number.

1203402120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203402120 is an abundant number, since it is smaller than the sum of its proper divisors (2619175800).

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

1203402120 is a wasteful number, since it uses less digits than its factorization.

1203402120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589934 (or 589930 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1203402120 is about 34690.0867684127. The cubic root of 1203402120 is about 1063.6618693968.

Adding to 1203402120 its reverse (212043021), we get a palindrome (1415445141).

The spelling of 1203402120 in words is "one billion, two hundred three million, four hundred two thousand, one hundred twenty".