610000021 has 8 divisors (see below), whose sum is σ = 624805280. Its totient is φ = 595222992.

The previous prime is 610000003. The next prime is 610000049. The reversal of 610000021 is 120000016.

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 610000021 - 2¹⁷ = 609868949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609999962 and 610000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610000081) 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, 40510 + ... + 53488.

It is an arithmetic number, because the mean of its divisors is an integer number (78100660).

Almost surely, 2^610000021 is an apocalyptic number.

610000021 is the 14260-th hex number.

It is an amenable number.

610000021 is a deficient number, since it is larger than the sum of its proper divisors (14805259).

610000021 is a wasteful number, since it uses less digits than its factorization.

610000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14115.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 610000021 is about 24698.1784955895. The cubic root of 610000021 is about 848.0926185810.

Adding to 610000021 its reverse (120000016), we get a palindrome (730000037).

The spelling of 610000021 in words is "six hundred ten million, twenty-one", and thus it is an aban number.