1420256417 has 16 divisors (see below), whose sum is σ = 1519119360. Its totient is φ = 1324598352.

The previous prime is 1420256407. The next prime is 1420256477. The reversal of 1420256417 is 7146520241.

It is a cyclic number.

It is not a de Polignac number, because 1420256417 - 2⁴ = 1420256401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420256407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876434 + ... + 878052.

It is an arithmetic number, because the mean of its divisors is an integer number (94944960).

Almost surely, 2^1420256417 is an apocalyptic number.

It is an amenable number.

1420256417 is a deficient number, since it is larger than the sum of its proper divisors (98862943).

1420256417 is a wasteful number, since it uses less digits than its factorization.

1420256417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1420256417 is about 37686.2895095816. The cubic root of 1420256417 is about 1124.0585155577.

Adding to 1420256417 its reverse (7146520241), we get a palindrome (8566776658).

The spelling of 1420256417 in words is "one billion, four hundred twenty million, two hundred fifty-six thousand, four hundred seventeen".