1421999125 has 8 divisors (see below), whose sum is σ = 1774655064. Its totient is φ = 1137599200.

The previous prime is 1421999057. The next prime is 1421999129. The reversal of 1421999125 is 5219991241.

It can be written as a sum of positive squares in 4 ways, for example, as 279491524 + 1142507601 = 16718^2 + 33801^2 .

It is not a de Polignac number, because 1421999125 - 2⁷ = 1421998997 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421999129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5687872 + ... + 5688121.

It is an arithmetic number, because the mean of its divisors is an integer number (221831883).

Almost surely, 2^1421999125 is an apocalyptic number.

It is an amenable number.

1421999125 is a deficient number, since it is larger than the sum of its proper divisors (352655939).

1421999125 is an equidigital number, since it uses as much as digits as its factorization.

1421999125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11376008 (or 11375998 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The square root of 1421999125 is about 37709.4036680508. The cubic root of 1421999125 is about 1124.5180816551.

The spelling of 1421999125 in words is "one billion, four hundred twenty-one million, nine hundred ninety-nine thousand, one hundred twenty-five".