1240513451 has 2 divisors, whose sum is σ = 1240513452. Its totient is φ = 1240513450.

The previous prime is 1240513447. The next prime is 1240513457. The reversal of 1240513451 is 1543150421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240513451 - 2² = 1240513447 is a prime.

It is a super-2 number, since 2×1240513451² = 3077747244223858802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1240513451.

It is not a weakly prime, because it can be changed into another prime (1240513457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620256725 + 620256726.

It is an arithmetic number, because the mean of its divisors is an integer number (620256726).

Almost surely, 2^1240513451 is an apocalyptic number.

1240513451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240513451 is an equidigital number, since it uses as much as digits as its factorization.

1240513451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1240513451 is about 35220.9234830661. The cubic root of 1240513451 is about 1074.4853353234.

Adding to 1240513451 its reverse (1543150421), we get a palindrome (2783663872).

The spelling of 1240513451 in words is "one billion, two hundred forty million, five hundred thirteen thousand, four hundred fifty-one".