1421437500 has 378 divisors, whose sum is σ = 5417274408. Its totient is φ = 307800000.

The previous prime is 1421437489. The next prime is 1421437517. The reversal of 1421437500 is 57341241.

1421437500 is a `hidden beast` number, since 14 + 2 + 143 + 7 + 500 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 74812491 + ... + 74812509.

Almost surely, 2^1421437500 is an apocalyptic number.

1421437500 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 1421437500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708637204).

1421437500 is an abundant number, since it is smaller than the sum of its proper divisors (3995836908).

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

1421437500 is an equidigital number, since it uses as much as digits as its factorization.

1421437500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1421437500 is about 37701.9561826704. The cubic root of 1421437500 is about 1124.3700176560.

Adding to 1421437500 its reverse (57341241), we get a palindrome (1478778741).

The spelling of 1421437500 in words is "one billion, four hundred twenty-one million, four hundred thirty-seven thousand, five hundred".