1061020621 has 8 divisors (see below), whose sum is σ = 1110259224. Its totient is φ = 1012864320.

The previous prime is 1061020603. The next prime is 1061020633. The reversal of 1061020621 is 1260201601.

It can be written as a sum of positive squares in 4 ways, for example, as 154107396 + 906913225 = 12414^2 + 30115^2 .

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 1061020621 - 2⁵ = 1061020589 is a prime.

It is a super-2 number, since 2×1061020621² = 2251529516374451282, 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 (1061020661) 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, 268570 + ... + 272491.

It is an arithmetic number, because the mean of its divisors is an integer number (138782403).

Almost surely, 2^1061020621 is an apocalyptic number.

It is an amenable number.

1061020621 is a deficient number, since it is larger than the sum of its proper divisors (49238603).

1061020621 is an equidigital number, since it uses as much as digits as its factorization.

1061020621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541151.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1061020621 is about 32573.3114834829. The cubic root of 1061020621 is about 1019.9399621845.

The spelling of 1061020621 in words is "one billion, sixty-one million, twenty thousand, six hundred twenty-one".