1616261 has 8 divisors (see below), whose sum is σ = 1680000. Its totient is φ = 1553760.

The previous prime is 1616231. The next prime is 1616269. The reversal of 1616261 is 1626161.

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 1616261 - 2¹⁴ = 1599877 is a prime.

It is a super-2 number, since 2×1616261² = 5224599240242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616269) 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, 2990 + ... + 3488.

It is an arithmetic number, because the mean of its divisors is an integer number (210000).

2^1616261 is an apocalyptic number.

It is an amenable number.

1616261 is a deficient number, since it is larger than the sum of its proper divisors (63739).

1616261 is an equidigital number, since it uses as much as digits as its factorization.

1616261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

The product of its digits is 432, while the sum is 23.

The square root of 1616261 is about 1271.3225397200. The cubic root of 1616261 is about 117.3556035193.

The spelling of 1616261 in words is "one million, six hundred sixteen thousand, two hundred sixty-one".