1240023031 has 16 divisors (see below), whose sum is σ = 1355104800. Its totient is φ = 1127881728.

The previous prime is 1240022981. The next prime is 1240023053. The reversal of 1240023031 is 1303200421.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240023031 is a prime.

It is a super-2 number, since 2×1240023031² = 3075314234820853922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240022996 and 1240023014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240023091) 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, 245055 + ... + 250063.

It is an arithmetic number, because the mean of its divisors is an integer number (84694050).

Almost surely, 2^1240023031 is an apocalyptic number.

1240023031 is a deficient number, since it is larger than the sum of its proper divisors (115081769).

1240023031 is a wasteful number, since it uses less digits than its factorization.

1240023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1240023031 is about 35213.9607400247. The cubic root of 1240023031 is about 1074.3437223072.

Adding to 1240023031 its reverse (1303200421), we get a palindrome (2543223452).

The spelling of 1240023031 in words is "one billion, two hundred forty million, twenty-three thousand, thirty-one".