1421243850 has 48 divisors (see below), whose sum is σ = 3795819552. Its totient is φ = 349844160.

The previous prime is 1421243779. The next prime is 1421243851. The reversal of 1421243850 is 583421241.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421243851) 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 23 ways as a sum of consecutive naturals, for example, 362472 + ... + 366371.

It is an arithmetic number, because the mean of its divisors is an integer number (79079574).

Almost surely, 2^1421243850 is an apocalyptic number.

1421243850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421243850 is an abundant number, since it is smaller than the sum of its proper divisors (2374575702).

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

1421243850 is a wasteful number, since it uses less digits than its factorization.

1421243850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728871 (or 728866 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1421243850 is about 37699.3879260659. The cubic root of 1421243850 is about 1124.3189556988.

The spelling of 1421243850 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, eight hundred fifty".