1421691024 has 120 divisors (see below), whose sum is σ = 4012590400. Its totient is φ = 431177472.

The previous prime is 1421691001. The next prime is 1421691043. The reversal of 1421691024 is 4201961241.

It is a junction number, because it is equal to n+sod(n) for n = 1421690982 and 1421691000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7144077 + ... + 7144275.

Almost surely, 2^1421691024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421691024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006295200).

1421691024 is an abundant number, since it is smaller than the sum of its proper divisors (2590899376).

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

1421691024 is a wasteful number, since it uses less digits than its factorization.

1421691024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1421691024 is about 37705.3182455738. The cubic root of 1421691024 is about 1124.4368602804.

The spelling of 1421691024 in words is "one billion, four hundred twenty-one million, six hundred ninety-one thousand, twenty-four".