123240151 has 4 divisors (see below), whose sum is σ = 123336904. Its totient is φ = 123143400.

The previous prime is 123240127. The next prime is 123240179. The reversal of 123240151 is 151042321.

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

It is a cyclic number.

It is not a de Polignac number, because 123240151 - 2⁵ = 123240119 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 (123240121) 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, 46440 + ... + 49021.

It is an arithmetic number, because the mean of its divisors is an integer number (30834226).

Almost surely, 2^123240151 is an apocalyptic number.

123240151 is a deficient number, since it is larger than the sum of its proper divisors (96753).

123240151 is an equidigital number, since it uses as much as digits as its factorization.

123240151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96752.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123240151 is about 11101.3580700741. The cubic root of 123240151 is about 497.6424359214.

Adding to 123240151 its reverse (151042321), we get a palindrome (274282472).

The spelling of 123240151 in words is "one hundred twenty-three million, two hundred forty thousand, one hundred fifty-one".