1421201400 has 96 divisors (see below), whose sum is σ = 4411912560. Its totient is φ = 378455040.

The previous prime is 1421201399. The next prime is 1421201423. The reversal of 1421201400 is 41021241.

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 1421201400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618654 + ... + 620946.

Almost surely, 2^1421201400 is an apocalyptic number.

1421201400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421201400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2205956280).

1421201400 is an abundant number, since it is smaller than the sum of its proper divisors (2990711160).

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

1421201400 is a wasteful number, since it uses less digits than its factorization.

1421201400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345 (or 3336 counting only the distinct ones).

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

The square root of 1421201400 is about 37698.8249153737. The cubic root of 1421201400 is about 1124.3077617917.

Adding to 1421201400 its reverse (41021241), we get a palindrome (1462222641).

The spelling of 1421201400 in words is "one billion, four hundred twenty-one million, two hundred one thousand, four hundred".