1240421210 has 32 divisors (see below), whose sum is σ = 2568644352. Its totient is φ = 422467200.

The previous prime is 1240421209. The next prime is 1240421219. The reversal of 1240421210 is 121240421.

It is not an unprimeable number, because it can be changed into a prime (1240421219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48107 + ... + 69246.

It is an arithmetic number, because the mean of its divisors is an integer number (80270136).

Almost surely, 2^1240421210 is an apocalyptic number.

1240421210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240421210 is an abundant number, since it is smaller than the sum of its proper divisors (1328223142).

1240421210 is a wasteful number, since it uses less digits than its factorization.

1240421210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117518.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1240421210 is about 35219.6139956133. The cubic root of 1240421210 is about 1074.4587027871.

Adding to 1240421210 its reverse (121240421), we get a palindrome (1361661631).

The spelling of 1240421210 in words is "one billion, two hundred forty million, four hundred twenty-one thousand, two hundred ten".