1578278245 has 8 divisors (see below), whose sum is σ = 1897399584. Its totient is φ = 1260312144.

The previous prime is 1578278237. The next prime is 1578278269. The reversal of 1578278245 is 5428728751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1578278245 - 2³ = 1578278237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285799 + ... + 291268.

It is an arithmetic number, because the mean of its divisors is an integer number (237174948).

Almost surely, 2^1578278245 is an apocalyptic number.

It is an amenable number.

1578278245 is a deficient number, since it is larger than the sum of its proper divisors (319121339).

1578278245 is an equidigital number, since it uses as much as digits as its factorization.

1578278245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577619.

The product of its digits is 1254400, while the sum is 49.

The square root of 1578278245 is about 39727.5502013401. The cubic root of 1578278245 is about 1164.2900609284.

The spelling of 1578278245 in words is "one billion, five hundred seventy-eight million, two hundred seventy-eight thousand, two hundred forty-five".