1421520000 has 160 divisors (see below), whose sum is σ = 4719176880. Its totient is φ = 379008000.

The previous prime is 1421519987. The next prime is 1421520007. The reversal of 1421520000 is 251241.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×1421520000² = 4041438220800000000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1421520007) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 237039 + ... + 242961.

Almost surely, 2^1421520000 is an apocalyptic number.

1421520000 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 1421520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359588440).

1421520000 is an abundant number, since it is smaller than the sum of its proper divisors (3297656880).

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

1421520000 is an frugal number, since it uses more digits than its factorization.

1421520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1421520000 is about 37703.0502744804. The cubic root of 1421520000 is about 1124.3917699858.

Adding to 1421520000 its reverse (251241), we get a palindrome (1421771241).

The spelling of 1421520000 in words is "one billion, four hundred twenty-one million, five hundred twenty thousand".