1240202140 has 12 divisors (see below), whose sum is σ = 2604424536. Its totient is φ = 496080848.

The previous prime is 1240202123. The next prime is 1240202167. The reversal of 1240202140 is 412020421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31005034 + ... + 31005073.

It is an arithmetic number, because the mean of its divisors is an integer number (217035378).

Almost surely, 2^1240202140 is an apocalyptic number.

1240202140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240202140 is an abundant number, since it is smaller than the sum of its proper divisors (1364222396).

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

1240202140 is a wasteful number, since it uses less digits than its factorization.

1240202140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62010116 (or 62010114 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1240202140 is about 35216.5038014849. The cubic root of 1240202140 is about 1074.3954459073.

Adding to 1240202140 its reverse (412020421), we get a palindrome (1652222561).

The spelling of 1240202140 in words is "one billion, two hundred forty million, two hundred two thousand, one hundred forty".