123240451 has 16 divisors (see below), whose sum is σ = 131459328. Its totient is φ = 115365600.

The previous prime is 123240449. The next prime is 123240461. The reversal of 123240451 is 154042321.

It is a cyclic number.

It is not a de Polignac number, because 123240451 - 2¹ = 123240449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123240421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112416 + ... + 113506.

It is an arithmetic number, because the mean of its divisors is an integer number (8216208).

Almost surely, 2^123240451 is an apocalyptic number.

123240451 is a deficient number, since it is larger than the sum of its proper divisors (8218877).

123240451 is a wasteful number, since it uses less digits than its factorization.

123240451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 123240451 is about 11101.3715819263. The cubic root of 123240451 is about 497.6428397200.

Adding to 123240451 its reverse (154042321), we get a palindrome (277282772).

The spelling of 123240451 in words is "one hundred twenty-three million, two hundred forty thousand, four hundred fifty-one".