1420784825 has 12 divisors (see below), whose sum is σ = 1762415100. Its totient is φ = 1136213760.

The previous prime is 1420784759. The next prime is 1420784851. The reversal of 1420784825 is 5284870241.

It can be written as a sum of positive squares in 6 ways, for example, as 227496889 + 1193287936 = 15083^2 + 34544^2 .

It is not a de Polignac number, because 1420784825 - 2²⁴ = 1404007609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72701 + ... + 90149.

It is an arithmetic number, because the mean of its divisors is an integer number (146867925).

Almost surely, 2^1420784825 is an apocalyptic number.

It is an amenable number.

1420784825 is a deficient number, since it is larger than the sum of its proper divisors (341630275).

1420784825 is a wasteful number, since it uses less digits than its factorization.

1420784825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20716 (or 20711 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 41.

The square root of 1420784825 is about 37693.2994708609. The cubic root of 1420784825 is about 1124.1979006854.

The spelling of 1420784825 in words is "one billion, four hundred twenty million, seven hundred eighty-four thousand, eight hundred twenty-five".