123869261 has 4 divisors (see below), whose sum is σ = 125968800. Its totient is φ = 121769724.

The previous prime is 123869243. The next prime is 123869279. The reversal of 123869261 is 162968321.

It is a happy number.

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: 162968321 = 67 ⋅2432363.

It is an interprime number because it is at equal distance from previous prime (123869243) and next prime (123869279).

It is a cyclic number.

It is not a de Polignac number, because 123869261 - 2¹⁸ = 123607117 is a prime.

It is a super-2 number, since 2×123869261² = 30687187641372242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123869201) 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, 1049681 + ... + 1049798.

It is an arithmetic number, because the mean of its divisors is an integer number (31492200).

Almost surely, 2^123869261 is an apocalyptic number.

It is an amenable number.

123869261 is a deficient number, since it is larger than the sum of its proper divisors (2099539).

123869261 is an equidigital number, since it uses as much as digits as its factorization.

123869261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099538.

The product of its digits is 31104, while the sum is 38.

The square root of 123869261 is about 11129.6568231011. The cubic root of 123869261 is about 498.4877789861.

The spelling of 123869261 in words is "one hundred twenty-three million, eight hundred sixty-nine thousand, two hundred sixty-one".