123455412 has 36 divisors (see below), whose sum is σ = 312522756. Its totient is φ = 41091840.

The previous prime is 123455401. The next prime is 123455413. The reversal of 123455412 is 214554321.

It can be written as a sum of positive squares in 2 ways, for example, as 78216336 + 45239076 = 8844^2 + 6726^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455413) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27468 + ... + 31644.

Almost surely, 2^123455412 is an apocalyptic number.

123455412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123455412 is an abundant number, since it is smaller than the sum of its proper divisors (189067344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123455412 is a wasteful number, since it uses less digits than its factorization.

123455412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008 (or 5003 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 123455412 is about 11111.0490953825. The cubic root of 123455412 is about 497.9320079430.

It can be divided in two parts, 123 and 455412, that added together give a triangular number (455535 = T₉₅₄).

The spelling of 123455412 in words is "one hundred twenty-three million, four hundred fifty-five thousand, four hundred twelve".