1000021492 has 6 divisors (see below), whose sum is σ = 1750037618. Its totient is φ = 500010744.

The previous prime is 1000021489. The next prime is 1000021507. The reversal of 1000021492 is 2941200001.

It can be written as a sum of positive squares in only one way, i.e., 614841616 + 385179876 = 24796^2 + 19626^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125002683 + ... + 125002690.

Almost surely, 2^1000021492 is an apocalyptic number.

It is an amenable number.

1000021492 is a deficient number, since it is larger than the sum of its proper divisors (750016126).

1000021492 is a wasteful number, since it uses less digits than its factorization.

1000021492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250005377 (or 250005375 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1000021492 is about 31623.1164182153. The cubic root of 1000021492 is about 1000.0071639487.

Adding to 1000021492 its reverse (2941200001), we get a palindrome (3941221493).

The spelling of 1000021492 in words is "one billion, twenty-one thousand, four hundred ninety-two".