6161021 has 8 divisors (see below), whose sum is σ = 6748920. Its totient is φ = 5598208.

The previous prime is 6161017. The next prime is 6161039. The reversal of 6161021 is 1201616.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1792921 + 4368100 = 1339^2 + 2090^2 .

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 6161021 - 2² = 6161017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161041) 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, 5756 + ... + 6741.

It is an arithmetic number, because the mean of its divisors is an integer number (843615).

Almost surely, 2^6161021 is an apocalyptic number.

It is an amenable number.

6161021 is a deficient number, since it is larger than the sum of its proper divisors (587899).

6161021 is a wasteful number, since it uses less digits than its factorization.

6161021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 6161021 is about 2482.1404069875. The cubic root of 6161021 is about 183.3232563791.

Adding to 6161021 its reverse (1201616), we get a palindrome (7362637).

The spelling of 6161021 in words is "six million, one hundred sixty-one thousand, twenty-one".