123451153249 has 4 divisors (see below), whose sum is σ = 123479543700. Its totient is φ = 123422762800.

The previous prime is 123451153247. The next prime is 123451153271. The reversal of 123451153249 is 942351154321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942351154321 = 4289 ⋅219713489.

It can be written as a sum of positive squares in 2 ways, for example, as 33791630625 + 89659522624 = 183825^2 + 299432^2 .

It is a cyclic number.

It is not a de Polignac number, because 123451153249 - 2¹ = 123451153247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123451153247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14188702 + ... + 14197399.

It is an arithmetic number, because the mean of its divisors is an integer number (30869885925).

Almost surely, 2^123451153249 is an apocalyptic number.

It is an amenable number.

123451153249 is a deficient number, since it is larger than the sum of its proper divisors (28390451).

123451153249 is an equidigital number, since it uses as much as digits as its factorization.

123451153249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28390450.

The product of its digits is 129600, while the sum is 40.

The spelling of 123451153249 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred fifty-three thousand, two hundred forty-nine".