1421256504 has 64 divisors (see below), whose sum is σ = 3673313280. Its totient is φ = 457776000.

The previous prime is 1421256493. The next prime is 1421256509. The reversal of 1421256504 is 4056521241.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421256509) 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, 758689 + ... + 760559.

It is an arithmetic number, because the mean of its divisors is an integer number (57395520).

Almost surely, 2^1421256504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421256504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836656640).

1421256504 is an abundant number, since it is smaller than the sum of its proper divisors (2252056776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421256504 is a wasteful number, since it uses less digits than its factorization.

1421256504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1421256504 is about 37699.5557533507. Note that the first 3 decimals coincide. The cubic root of 1421256504 is about 1124.3222924684.

Adding to 1421256504 its reverse (4056521241), we get a palindrome (5477777745).

The spelling of 1421256504 in words is "one billion, four hundred twenty-one million, two hundred fifty-six thousand, five hundred four".