1240420202 has 24 divisors (see below), whose sum is σ = 2166678756. Its totient is φ = 531050688.

The previous prime is 1240420169. The next prime is 1240420211. The reversal of 1240420202 is 2020240421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1136970961 + 103449241 = 33719^2 + 10171^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95108 + ... + 107360.

Almost surely, 2^1240420202 is an apocalyptic number.

1240420202 is a deficient number, since it is larger than the sum of its proper divisors (926258554).

1240420202 is a wasteful number, since it uses less digits than its factorization.

1240420202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13302 (or 13295 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1240420202 is about 35219.5996854024. The cubic root of 1240420202 is about 1074.4584117422.

Adding to 1240420202 its reverse (2020240421), we get a palindrome (3260660623).

The spelling of 1240420202 in words is "one billion, two hundred forty million, four hundred twenty thousand, two hundred two".