1245676618 has 4 divisors (see below), whose sum is σ = 1868514930. Its totient is φ = 622838308.

The previous prime is 1245676603. The next prime is 1245676667. The reversal of 1245676618 is 8166765421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8166765421 = 19 ⋅429829759.

It can be written as a sum of positive squares in only one way, i.e., 1210831209 + 34845409 = 34797^2 + 5903^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311419153 + ... + 311419156.

Almost surely, 2^1245676618 is an apocalyptic number.

1245676618 is a deficient number, since it is larger than the sum of its proper divisors (622838312).

1245676618 is an equidigital number, since it uses as much as digits as its factorization.

1245676618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622838311.

The product of its digits is 483840, while the sum is 46.

The square root of 1245676618 is about 35294.1442451861. The cubic root of 1245676618 is about 1075.9739845518.

The spelling of 1245676618 in words is "one billion, two hundred forty-five million, six hundred seventy-six thousand, six hundred eighteen".