2661229 has 4 divisors (see below), whose sum is σ = 2693376. Its totient is φ = 2629084.

The previous prime is 2661221. The next prime is 2661233. The reversal of 2661229 is 9221662.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9221662 = 2 ⋅4610831.

It is a cyclic number.

It is not a de Polignac number, because 2661229 - 2³ = 2661221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661197 and 2661206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661221) 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, 15949 + ... + 16114.

It is an arithmetic number, because the mean of its divisors is an integer number (673344).

2^2661229 is an apocalyptic number.

It is an amenable number.

2661229 is a deficient number, since it is larger than the sum of its proper divisors (32147).

2661229 is an equidigital number, since it uses as much as digits as its factorization.

2661229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32146.

The product of its digits is 2592, while the sum is 28.

The square root of 2661229 is about 1631.3273736439. The cubic root of 2661229 is about 138.5779340432.

The spelling of 2661229 in words is "two million, six hundred sixty-one thousand, two hundred twenty-nine".