1061662021 has 8 divisors (see below), whose sum is σ = 1213580160. Its totient is φ = 909806928.

The previous prime is 1061662003. The next prime is 1061662033. The reversal of 1061662021 is 1202661601.

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 1061662021 - 2¹⁹ = 1061137733 is a prime.

It is a super-2 number, since 2×1061662021² = 2254252493667608882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061662051) 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, 28695 + ... + 54283.

It is an arithmetic number, because the mean of its divisors is an integer number (151697520).

Almost surely, 2^1061662021 is an apocalyptic number.

It is an amenable number.

1061662021 is a deficient number, since it is larger than the sum of its proper divisors (151918139).

1061662021 is an equidigital number, since it uses as much as digits as its factorization.

1061662021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31523.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1061662021 is about 32583.1554794805. The cubic root of 1061662021 is about 1020.1454428639.

The spelling of 1061662021 in words is "one billion, sixty-one million, six hundred sixty-two thousand, twenty-one".