1421503900 has 18 divisors (see below), whose sum is σ = 3084663680. Its totient is φ = 568601520.

The previous prime is 1421503879. The next prime is 1421503903. The reversal of 1421503900 is 93051241.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421503903) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7107420 + ... + 7107619.

Almost surely, 2^1421503900 is an apocalyptic number.

1421503900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421503900 is an abundant number, since it is smaller than the sum of its proper divisors (1663159780).

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

1421503900 is a wasteful number, since it uses less digits than its factorization.

1421503900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14215053 (or 14215046 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1421503900 is about 37702.8367632994. The cubic root of 1421503900 is about 1124.3875250518.

The spelling of 1421503900 in words is "one billion, four hundred twenty-one million, five hundred three thousand, nine hundred".