123152481 has 10 divisors (see below), whose sum is σ = 183968642. Its totient is φ = 82101600.

The previous prime is 123152467. The next prime is 123152489. The reversal of 123152481 is 184251321.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 41990400 = 9009^2 + 6480^2 .

It is not a de Polignac number, because 123152481 - 2⁷ = 123152353 is a prime.

It is a super-2 number, since 2×123152481² = 30333067152910722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123152489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 760120 + ... + 760281.

Almost surely, 2^123152481 is an apocalyptic number.

It is an amenable number.

123152481 is a deficient number, since it is larger than the sum of its proper divisors (60816161).

123152481 is an equidigital number, since it uses as much as digits as its factorization.

123152481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520413 (or 1520404 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 123152481 is about 11097.4087515960. The cubic root of 123152481 is about 497.5244044155.

The spelling of 123152481 in words is "one hundred twenty-three million, one hundred fifty-two thousand, four hundred eighty-one".