1202142440 has 16 divisors (see below), whose sum is σ = 2704820580. Its totient is φ = 480856960.

The previous prime is 1202142421. The next prime is 1202142467. The reversal of 1202142440 is 442412021.

It can be written as a sum of positive squares in 2 ways, for example, as 1012639684 + 189502756 = 31822^2 + 13766^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15026741 + ... + 15026820.

Almost surely, 2^1202142440 is an apocalyptic number.

1202142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202142440 is an abundant number, since it is smaller than the sum of its proper divisors (1502678140).

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

1202142440 is a wasteful number, since it uses less digits than its factorization.

1202142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30053572 (or 30053568 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1202142440 is about 34671.9258190254. The cubic root of 1202142440 is about 1063.2906049224.

Adding to 1202142440 its reverse (442412021), we get a palindrome (1644554461).

The spelling of 1202142440 in words is "one billion, two hundred two million, one hundred forty-two thousand, four hundred forty".