1245305507 has 4 divisors (see below), whose sum is σ = 1266412440. Its totient is φ = 1224198576.

The previous prime is 1245305461. The next prime is 1245305531. The reversal of 1245305507 is 7055035421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245305507 - 2¹⁸ = 1245043363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245305597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10553378 + ... + 10553495.

It is an arithmetic number, because the mean of its divisors is an integer number (316603110).

Almost surely, 2^1245305507 is an apocalyptic number.

1245305507 is a deficient number, since it is larger than the sum of its proper divisors (21106933).

1245305507 is an equidigital number, since it uses as much as digits as its factorization.

1245305507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21106932.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 1245305507 is about 35288.8864516862. The cubic root of 1245305507 is about 1075.8671228308.

The spelling of 1245305507 in words is "one billion, two hundred forty-five million, three hundred five thousand, five hundred seven".