123551541 has 8 divisors (see below), whose sum is σ = 183039360. Its totient is φ = 82367676.

The previous prime is 123551539. The next prime is 123551543. The reversal of 123551541 is 145155321.

It is an interprime number because it is at equal distance from previous prime (123551539) and next prime (123551543).

It is not a de Polignac number, because 123551541 - 2¹ = 123551539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4575983 = 123551541 / (1 + 2 + 3 + 5 + 5 + 1 + 5 + 4 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123551543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287965 + ... + 2288018.

It is an arithmetic number, because the mean of its divisors is an integer number (22879920).

Almost surely, 2^123551541 is an apocalyptic number.

It is an amenable number.

123551541 is a deficient number, since it is larger than the sum of its proper divisors (59487819).

123551541 is an equidigital number, since it uses as much as digits as its factorization.

123551541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575992 (or 4575986 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 123551541 is about 11115.3740827738. The cubic root of 123551541 is about 498.0612132622.

It can be divided in two parts, 12 and 3551541, that added together give a palindrome (3551553).

The spelling of 123551541 in words is "one hundred twenty-three million, five hundred fifty-one thousand, five hundred forty-one".