123345641 has 4 divisors (see below), whose sum is σ = 124498512. Its totient is φ = 122192772.

The previous prime is 123345631. The next prime is 123345643. The reversal of 123345641 is 146543321.

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: 146543321 = 47 ⋅3117943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123345641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123345643) 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, 576275 + ... + 576488.

It is an arithmetic number, because the mean of its divisors is an integer number (31124628).

Almost surely, 2^123345641 is an apocalyptic number.

It is an amenable number.

123345641 is a deficient number, since it is larger than the sum of its proper divisors (1152871).

123345641 is a wasteful number, since it uses less digits than its factorization.

123345641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152870.

The product of its digits is 8640, while the sum is 29.

The square root of 123345641 is about 11106.1082742786. The cubic root of 123345641 is about 497.7843845986.

Adding to 123345641 its reverse (146543321), we get a palindrome (269888962).

The spelling of 123345641 in words is "one hundred twenty-three million, three hundred forty-five thousand, six hundred forty-one".