1421137256 has 96 divisors (see below), whose sum is σ = 3374965440. Its totient is φ = 549120000.

The previous prime is 1421137217. The next prime is 1421137273. The reversal of 1421137256 is 6527311241.

It is a super-2 number, since 2×1421137256² = 4039262200782419072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 886856 + ... + 888456.

It is an arithmetic number, because the mean of its divisors is an integer number (35155890).

Almost surely, 2^1421137256 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 1421137256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687482720).

1421137256 is an abundant number, since it is smaller than the sum of its proper divisors (1953828184).

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

1421137256 is a wasteful number, since it uses less digits than its factorization.

1421137256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1752 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1421137256 is about 37697.9741630767. The cubic root of 1421137256 is about 1124.2908468346.

Adding to 1421137256 its reverse (6527311241), we get a palindrome (7948448497).

The spelling of 1421137256 in words is "one billion, four hundred twenty-one million, one hundred thirty-seven thousand, two hundred fifty-six".