123451040 has 24 divisors (see below), whose sum is σ = 291653460. Its totient is φ = 49380352.

The previous prime is 123450997. The next prime is 123451049. The reversal of 123451040 is 40154321.

It can be written as a sum of positive squares in 2 ways, for example, as 122855056 + 595984 = 11084^2 + 772^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (123451049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385625 + ... + 385944.

Almost surely, 2^123451040 is an apocalyptic number.

123451040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123451040 is an abundant number, since it is smaller than the sum of its proper divisors (168202420).

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

123451040 is an equidigital number, since it uses as much as digits as its factorization.

123451040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771584 (or 771576 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123451040 is about 11110.8523525425. The cubic root of 123451040 is about 497.9261300194.

The spelling of 123451040 in words is "one hundred twenty-three million, four hundred fifty-one thousand, forty".