1017168421 has 8 divisors (see below), whose sum is σ = 1036861560. Its totient is φ = 997493952.

The previous prime is 1017168413. The next prime is 1017168431. The reversal of 1017168421 is 1248617101.

It can be written as a sum of positive squares in 4 ways, for example, as 260100 + 1016908321 = 510^2 + 31889^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1017168421 - 2³ = 1017168413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1017168431) 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, 161691 + ... + 167863.

It is an arithmetic number, because the mean of its divisors is an integer number (129607695).

Almost surely, 2^1017168421 is an apocalyptic number.

It is an amenable number.

1017168421 is a deficient number, since it is larger than the sum of its proper divisors (19693139).

1017168421 is an equidigital number, since it uses as much as digits as its factorization.

1017168421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1017168421 is about 31893.0779480438. The cubic root of 1017168421 is about 1005.6903653240.

The spelling of 1017168421 in words is "one billion, seventeen million, one hundred sixty-eight thousand, four hundred twenty-one".