1423256417 has 4 divisors (see below), whose sum is σ = 1552643376. Its totient is φ = 1293869460.

The previous prime is 1423256377. The next prime is 1423256449. The reversal of 1423256417 is 7146523241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423256417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423256477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64693463 + ... + 64693484.

It is an arithmetic number, because the mean of its divisors is an integer number (388160844).

Almost surely, 2^1423256417 is an apocalyptic number.

It is an amenable number.

1423256417 is a deficient number, since it is larger than the sum of its proper divisors (129386959).

1423256417 is a wasteful number, since it uses less digits than its factorization.

1423256417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129386958.

The product of its digits is 40320, while the sum is 35.

The square root of 1423256417 is about 37726.0707866589. The cubic root of 1423256417 is about 1124.8494065419.

Adding to 1423256417 its reverse (7146523241), we get a palindrome (8569779658).

The spelling of 1423256417 in words is "one billion, four hundred twenty-three million, two hundred fifty-six thousand, four hundred seventeen".