123532261 has 4 divisors (see below), whose sum is σ = 125272224. Its totient is φ = 121792300.

The previous prime is 123532247. The next prime is 123532289. The reversal of 123532261 is 162235321.

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 a de Polignac number, because none of the positive numbers 2^k-123532261 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 (123532361) 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, 869875 + ... + 870016.

It is an arithmetic number, because the mean of its divisors is an integer number (31318056).

Almost surely, 2^123532261 is an apocalyptic number.

It is an amenable number.

123532261 is a deficient number, since it is larger than the sum of its proper divisors (1739963).

123532261 is an equidigital number, since it uses as much as digits as its factorization.

123532261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739962.

The product of its digits is 2160, while the sum is 25.

The square root of 123532261 is about 11114.5067816795. The cubic root of 123532261 is about 498.0353047233.

Adding to 123532261 its reverse (162235321), we get a palindrome (285767582).

The spelling of 123532261 in words is "one hundred twenty-three million, five hundred thirty-two thousand, two hundred sixty-one".