123402535 has 4 divisors (see below), whose sum is σ = 148083048. Its totient is φ = 98722024.

The previous prime is 123402529. The next prime is 123402553. The reversal of 123402535 is 535204321.

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 123402535 - 2⁷ = 123402407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12340249 + ... + 12340258.

It is an arithmetic number, because the mean of its divisors is an integer number (37020762).

Almost surely, 2^123402535 is an apocalyptic number.

123402535 is a deficient number, since it is larger than the sum of its proper divisors (24680513).

123402535 is an equidigital number, since it uses as much as digits as its factorization.

123402535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24680512.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 123402535 is about 11108.6693622594. The cubic root of 123402535 is about 497.8609082905.

Adding to 123402535 its reverse (535204321), we get a palindrome (658606856).

The spelling of 123402535 in words is "one hundred twenty-three million, four hundred two thousand, five hundred thirty-five".