1421422400 has 42 divisors (see below), whose sum is σ = 3497591430. Its totient is φ = 568568320.

The previous prime is 1421422391. The next prime is 1421422421. The reversal of 1421422400 is 42241241.

It can be written as a sum of positive squares in 3 ways, for example, as 20866624 + 1400555776 = 4568^2 + 37424^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 442595 + ... + 445794.

Almost surely, 2^1421422400 is an apocalyptic number.

1421422400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421422400 is an abundant number, since it is smaller than the sum of its proper divisors (2076169030).

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

1421422400 is an equidigital number, since it uses as much as digits as its factorization.

1421422400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888411 (or 888396 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1421422400 is about 37701.7559272774. The cubic root of 1421422400 is about 1124.3660362294.

Adding to 1421422400 its reverse (42241241), we get a palindrome (1463663641).

The spelling of 1421422400 in words is "one billion, four hundred twenty-one million, four hundred twenty-two thousand, four hundred".