1421802720 has 576 divisors, whose sum is σ = 5663286720. Its totient is φ = 334430208.

The previous prime is 1421802713. The next prime is 1421802721. The reversal of 1421802720 is 272081241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421802721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14657712 + ... + 14657808.

It is an arithmetic number, because the mean of its divisors is an integer number (9832095).

Almost surely, 2^1421802720 is an apocalyptic number.

1421802720 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 1421802720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2831643360).

1421802720 is an abundant number, since it is smaller than the sum of its proper divisors (4241484000).

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

1421802720 is a wasteful number, since it uses less digits than its factorization.

1421802720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1421802720 is about 37706.7993868480. The cubic root of 1421802720 is about 1124.4663068593.

Adding to 1421802720 its reverse (272081241), we get a palindrome (1693883961).

The spelling of 1421802720 in words is "one billion, four hundred twenty-one million, eight hundred two thousand, seven hundred twenty".