1011431240 has 32 divisors (see below), whose sum is σ = 2313032760. Its totient is φ = 397939200.

The previous prime is 1011431207. The next prime is 1011431257. The reversal of 1011431240 is 421341101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 502387396 + 509043844 = 22414^2 + 22562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204821 + ... + 209700.

Almost surely, 2^1011431240 is an apocalyptic number.

1011431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011431240 is an abundant number, since it is smaller than the sum of its proper divisors (1301601520).

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

1011431240 is a wasteful number, since it uses less digits than its factorization.

1011431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414593 (or 414589 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1011431240 is about 31803.0067760896. The cubic root of 1011431240 is about 1003.7959855939.

Adding to 1011431240 its reverse (421341101), we get a palindrome (1432772341).

It can be divided in two parts, 101 and 1431240, that added together give a palindrome (1431341).

The spelling of 1011431240 in words is "one billion, eleven million, four hundred thirty-one thousand, two hundred forty".