2099261 has 8 divisors (see below), whose sum is σ = 2153400. Its totient is φ = 2045952.

The previous prime is 2099249. The next prime is 2099263. The reversal of 2099261 is 1629902.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 2088025 = 106^2 + 1445^2 .

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 2099261 - 2⁶ = 2099197 is a prime.

It is a super-2 number, since 2×2099261² = 8813793492242, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 0 + 9² + 9³ + 2²¹ + 6⁴ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10781 + ... + 10973.

It is an arithmetic number, because the mean of its divisors is an integer number (269175).

2^2099261 is an apocalyptic number.

It is an amenable number.

2099261 is a deficient number, since it is larger than the sum of its proper divisors (54139).

2099261 is a wasteful number, since it uses less digits than its factorization.

2099261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2099261 is about 1448.8826729587. The cubic root of 2099261 is about 128.0428933395.

The spelling of 2099261 in words is "two million, ninety-nine thousand, two hundred sixty-one".