1240450531 has 16 divisors (see below), whose sum is σ = 1298203200. Its totient is φ = 1184135680.

The previous prime is 1240450507. The next prime is 1240450571. The reversal of 1240450531 is 1350540421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1240450531 - 2⁹ = 1240450019 is a prime.

It is a super-2 number, since 2×1240450531² = 3077435039716363922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240450496 and 1240450505.

It is not an unprimeable number, because it can be changed into a prime (1240450501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1301151 + ... + 1302103.

It is an arithmetic number, because the mean of its divisors is an integer number (81137700).

Almost surely, 2^1240450531 is an apocalyptic number.

1240450531 is a deficient number, since it is larger than the sum of its proper divisors (57752669).

1240450531 is an equidigital number, since it uses as much as digits as its factorization.

1240450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1240450531 is about 35220.0302526843. The cubic root of 1240450531 is about 1074.4671687165.

Adding to 1240450531 its reverse (1350540421), we get a palindrome (2590990952).

The spelling of 1240450531 in words is "one billion, two hundred forty million, four hundred fifty thousand, five hundred thirty-one".