1240700453 has 2 divisors, whose sum is σ = 1240700454. Its totient is φ = 1240700452.

The previous prime is 1240700413. The next prime is 1240700471. The reversal of 1240700453 is 3540070421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1195568929 + 45131524 = 34577^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240700453 - 2⁶ = 1240700389 is a prime.

It is a super-2 number, since 2×1240700453² = 3078675228148810418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240700413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620350226 + 620350227.

It is an arithmetic number, because the mean of its divisors is an integer number (620350227).

Almost surely, 2^1240700453 is an apocalyptic number.

It is an amenable number.

1240700453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240700453 is an equidigital number, since it uses as much as digits as its factorization.

1240700453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 1240700453 is about 35223.5780834372. The cubic root of 1240700453 is about 1074.5393239388.

Adding to 1240700453 its reverse (3540070421), we get a palindrome (4780770874).

The spelling of 1240700453 in words is "one billion, two hundred forty million, seven hundred thousand, four hundred fifty-three".