1240202142 has 24 divisors (see below), whose sum is σ = 2687753016. Its totient is φ = 413300976.

The previous prime is 1240202123. The next prime is 1240202167. The reversal of 1240202142 is 2412020421.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137413 + ... + 146159.

It is an arithmetic number, because the mean of its divisors is an integer number (111989709).

Almost surely, 2^1240202142 is an apocalyptic number.

1240202142 is an abundant number, since it is smaller than the sum of its proper divisors (1447550874).

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

1240202142 is a wasteful number, since it uses less digits than its factorization.

1240202142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632 (or 16629 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1240202142 is about 35216.5038298807. The cubic root of 1240202142 is about 1074.3954464848.

Adding to 1240202142 its reverse (2412020421), we get a palindrome (3652222563).

The spelling of 1240202142 in words is "one billion, two hundred forty million, two hundred two thousand, one hundred forty-two".