123412040 has 32 divisors (see below), whose sum is σ = 278079480. Its totient is φ = 49293312.

The previous prime is 123412019. The next prime is 123412063. The reversal of 123412040 is 40214321.

It can be written as a sum of positive squares in 4 ways, for example, as 26152996 + 97259044 = 5114^2 + 9862^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32312 + ... + 35928.

Almost surely, 2^123412040 is an apocalyptic number.

123412040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123412040 is an abundant number, since it is smaller than the sum of its proper divisors (154667440).

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

123412040 is a wasteful number, since it uses less digits than its factorization.

123412040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123412040 is about 11109.0971730380. The cubic root of 123412040 is about 497.8736904332.

Adding to 123412040 its reverse (40214321), we get a palindrome (163626361).

The spelling of 123412040 in words is "one hundred twenty-three million, four hundred twelve thousand, forty".