1021749486 has 8 divisors (see below), whose sum is σ = 2043498984. Its totient is φ = 340583160.

The previous prime is 1021749461. The next prime is 1021749499. The reversal of 1021749486 is 6849471201.

It is a sphenic number, since it is the product of 3 distinct primes.

1021749486 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85145785 + ... + 85145796.

It is an arithmetic number, because the mean of its divisors is an integer number (255437373).

Almost surely, 2^1021749486 is an apocalyptic number.

1021749486 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1021749486 is a wasteful number, since it uses less digits than its factorization.

1021749486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170291586.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1021749486 is about 31964.8163767602. The cubic root of 1021749486 is about 1007.1978946721.

The spelling of 1021749486 in words is "one billion, twenty-one million, seven hundred forty-nine thousand, four hundred eighty-six".