1202155040 has 48 divisors (see below), whose sum is σ = 2872036440. Its totient is φ = 475453440.

The previous prime is 1202155039. The next prime is 1202155057. The reversal of 1202155040 is 405512021.

It can be written as a sum of positive squares in 4 ways, for example, as 1068243856 + 133911184 = 32684^2 + 11572^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 27971 + ... + 56450.

Almost surely, 2^1202155040 is an apocalyptic number.

1202155040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202155040 is an abundant number, since it is smaller than the sum of its proper divisors (1669881400).

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

1202155040 is an equidigital number, since it uses as much as digits as its factorization.

1202155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84525 (or 84517 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1202155040 is about 34672.1075217530. The cubic root of 1202155040 is about 1063.2943197941.

Adding to 1202155040 its reverse (405512021), we get a palindrome (1607667061).

The spelling of 1202155040 in words is "one billion, two hundred two million, one hundred fifty-five thousand, forty".