123402734 has 16 divisors (see below), whose sum is σ = 227820768. Its totient is φ = 48818592.

The previous prime is 123402691. The next prime is 123402761. The reversal of 123402734 is 437204321.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 338837 + ... + 339200.

It is an arithmetic number, because the mean of its divisors is an integer number (14238798).

Almost surely, 2^123402734 is an apocalyptic number.

123402734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123402734 is a deficient number, since it is larger than the sum of its proper divisors (104418034).

123402734 is a wasteful number, since it uses less digits than its factorization.

123402734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678059.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 123402734 is about 11108.6783192241. The cubic root of 123402734 is about 497.8611759086.

The spelling of 123402734 in words is "one hundred twenty-three million, four hundred two thousand, seven hundred thirty-four".