1420778599 has 8 divisors (see below), whose sum is σ = 1497562880. Its totient is φ = 1344195000.

The previous prime is 1420778551. The next prime is 1420778641. The reversal of 1420778599 is 9958770241.

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 1420778599 - 2²⁷ = 1286560871 is a prime.

It is a super-2 number, since 2×1420778599² = 4037223654752805602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420778899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35517 + ... + 64054.

It is an arithmetic number, because the mean of its divisors is an integer number (187195360).

Almost surely, 2^1420778599 is an apocalyptic number.

1420778599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1420778599 is a deficient number, since it is larger than the sum of its proper divisors (76784281).

1420778599 is an equidigital number, since it uses as much as digits as its factorization.

1420778599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100341.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1420778599 is about 37693.2168831476. The cubic root of 1420778599 is about 1124.1962585727.

The spelling of 1420778599 in words is "one billion, four hundred twenty million, seven hundred seventy-eight thousand, five hundred ninety-nine".