1245940099 has 2 divisors, whose sum is σ = 1245940100. Its totient is φ = 1245940098.

The previous prime is 1245940057. The next prime is 1245940151. The reversal of 1245940099 is 9900495421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245940099 - 2⁷ = 1245939971 is a prime.

It is a super-2 number, since 2×1245940099² = 3104733460592259602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245940009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622970049 + 622970050.

It is an arithmetic number, because the mean of its divisors is an integer number (622970050).

Almost surely, 2^1245940099 is an apocalyptic number.

1245940099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245940099 is an equidigital number, since it uses as much as digits as its factorization.

1245940099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1245940099 is about 35297.8766925151. The cubic root of 1245940099 is about 1076.0498412419.

The spelling of 1245940099 in words is "one billion, two hundred forty-five million, nine hundred forty thousand, ninety-nine".