1421143500 has 96 divisors (see below), whose sum is σ = 4729600512. Its totient is φ = 324830400.

The previous prime is 1421143489. The next prime is 1421143511. The reversal of 1421143500 is 53411241.

It is an interprime number because it is at equal distance from previous prime (1421143489) and next prime (1421143511).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57174 + ... + 78173.

It is an arithmetic number, because the mean of its divisors is an integer number (49266672).

Almost surely, 2^1421143500 is an apocalyptic number.

1421143500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421143500 is an abundant number, since it is smaller than the sum of its proper divisors (3308457012).

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

1421143500 is a wasteful number, since it uses less digits than its factorization.

1421143500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135376 (or 135364 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1421143500 is about 37698.0569791070. The cubic root of 1421143500 is about 1124.2924934177.

Adding to 1421143500 its reverse (53411241), we get a palindrome (1474554741).

The spelling of 1421143500 in words is "one billion, four hundred twenty-one million, one hundred forty-three thousand, five hundred".