1421987850 has 36 divisors (see below), whose sum is σ = 3820408566. Its totient is φ = 379196640.

The previous prime is 1421987849. The next prime is 1421987923. The reversal of 1421987850 is 587891241.

It can be written as a sum of positive squares in 3 ways, for example, as 1169845209 + 252142641 = 34203^2 + 15879^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1421987796 and 1421987805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1579537 + ... + 1580436.

Almost surely, 2^1421987850 is an apocalyptic number.

1421987850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421987850 is an abundant number, since it is smaller than the sum of its proper divisors (2398420716).

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

1421987850 is a wasteful number, since it uses less digits than its factorization.

1421987850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159991 (or 3159983 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1421987850 is about 37709.2541692354. The cubic root of 1421987850 is about 1124.5151095541.

The spelling of 1421987850 in words is "one billion, four hundred twenty-one million, nine hundred eighty-seven thousand, eight hundred fifty".