2152261 has 4 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 2115724.

The previous prime is 2152247. The next prime is 2152291. The reversal of 2152261 is 1622512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2152261 - 2⁵ = 2152229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18181 + ... + 18298.

It is an arithmetic number, because the mean of its divisors is an integer number (547200).

2^2152261 is an apocalyptic number.

It is an amenable number.

2152261 is a deficient number, since it is larger than the sum of its proper divisors (36539).

2152261 is an equidigital number, since it uses as much as digits as its factorization.

2152261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36538.

The product of its digits is 240, while the sum is 19.

The square root of 2152261 is about 1467.0586218689. The cubic root of 2152261 is about 129.1115154538. Note that the first 3 decimals are identical.

Adding to 2152261 its reverse (1622512), we get a palindrome (3774773).

The spelling of 2152261 in words is "two million, one hundred fifty-two thousand, two hundred sixty-one".