1421120400 has 120 divisors (see below), whose sum is σ = 5202684864. Its totient is φ = 324825600.

The previous prime is 1421120381. The next prime is 1421120413. The reversal of 1421120400 is 40211241.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1421120400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76191 + ... + 92990.

Almost surely, 2^1421120400 is an apocalyptic number.

1421120400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421120400 is an abundant number, since it is smaller than the sum of its proper divisors (3781564464).

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

1421120400 is a wasteful number, since it uses less digits than its factorization.

1421120400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169209 (or 169198 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1421120400 is about 37697.7505960236. The cubic root of 1421120400 is about 1124.2864017745.

Adding to 1421120400 its reverse (40211241), we get a palindrome (1461331641).

The spelling of 1421120400 in words is "one billion, four hundred twenty-one million, one hundred twenty thousand, four hundred".