1021686742 has 8 divisors (see below), whose sum is σ = 1542816000. Its totient is φ = 507414744.

The previous prime is 1021686739. The next prime is 1021686761. The reversal of 1021686742 is 2476861201.

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

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 in 3 ways as a sum of consecutive naturals, for example, 1713942 + ... + 1714537.

It is an arithmetic number, because the mean of its divisors is an integer number (192852000).

Almost surely, 2^1021686742 is an apocalyptic number.

1021686742 is a deficient number, since it is larger than the sum of its proper divisors (521129258).

1021686742 is a wasteful number, since it uses less digits than its factorization.

1021686742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428630.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1021686742 is about 31963.8349075952. The cubic root of 1021686742 is about 1007.1772774467.

The spelling of 1021686742 in words is "one billion, twenty-one million, six hundred eighty-six thousand, seven hundred forty-two".