1240023451 has 2 divisors, whose sum is σ = 1240023452. Its totient is φ = 1240023450.

The previous prime is 1240023443. The next prime is 1240023461. The reversal of 1240023451 is 1543200421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240023451 - 2³ = 1240023443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240023461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620011725 + 620011726.

It is an arithmetic number, because the mean of its divisors is an integer number (620011726).

Almost surely, 2^1240023451 is an apocalyptic number.

1240023451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240023451 is an equidigital number, since it uses as much as digits as its factorization.

1240023451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1240023451 is about 35213.9667035681. The cubic root of 1240023451 is about 1074.3438436018.

Adding to 1240023451 its reverse (1543200421), we get a palindrome (2783223872).

The spelling of 1240023451 in words is "one billion, two hundred forty million, twenty-three thousand, four hundred fifty-one".