1016742921 has 8 divisors (see below), whose sum is σ = 1359235680. Its totient is φ = 676039392.

The previous prime is 1016742917. The next prime is 1016742931. The reversal of 1016742921 is 1292476101.

It is a happy number.

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

It is not a de Polignac number, because 1016742921 - 2² = 1016742917 is a prime.

It is a super-2 number, since 2×1016742921² = 2067532334807224482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1016742911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445980 + ... + 448253.

It is an arithmetic number, because the mean of its divisors is an integer number (169904460).

Almost surely, 2^1016742921 is an apocalyptic number.

It is an amenable number.

1016742921 is a deficient number, since it is larger than the sum of its proper divisors (342492759).

1016742921 is an equidigital number, since it uses as much as digits as its factorization.

1016742921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894615.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1016742921 is about 31886.4065237838. The cubic root of 1016742921 is about 1005.5501129251.

The spelling of 1016742921 in words is "one billion, sixteen million, seven hundred forty-two thousand, nine hundred twenty-one".