123002261 has 4 divisors (see below), whose sum is σ = 123028524. Its totient is φ = 122976000.

The previous prime is 123002237. The next prime is 123002263. The reversal of 123002261 is 162200321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79032100 + 43970161 = 8890^2 + 6631^2 .

It is a cyclic number.

It is not a de Polignac number, because 123002261 - 2¹⁰ = 123001237 is a prime.

It is a super-2 number, since 2×123002261² = 30259112422224242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123002263) 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, 3980 + ... + 16181.

It is an arithmetic number, because the mean of its divisors is an integer number (30757131).

Almost surely, 2^123002261 is an apocalyptic number.

It is an amenable number.

123002261 is a deficient number, since it is larger than the sum of its proper divisors (26263).

123002261 is an equidigital number, since it uses as much as digits as its factorization.

123002261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26262.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123002261 is about 11090.6384396932. The cubic root of 123002261 is about 497.3220305662.

Adding to 123002261 its reverse (162200321), we get a palindrome (285202582).

The spelling of 123002261 in words is "one hundred twenty-three million, two thousand, two hundred sixty-one".