123851280 has 80 divisors (see below), whose sum is σ = 438793344. Its totient is φ = 28308480.

The previous prime is 123851279. The next prime is 123851281. The reversal of 123851280 is 82158321.

It is an interprime number because it is at equal distance from previous prime (123851279) and next prime (123851281).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (123851281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35181 + ... + 38540.

Almost surely, 2^123851280 is an apocalyptic number.

123851280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123851280 is an abundant number, since it is smaller than the sum of its proper divisors (314942064).

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

123851280 is a wasteful number, since it uses less digits than its factorization.

123851280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73744 (or 73738 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 123851280 is about 11128.8489970886. The cubic root of 123851280 is about 498.4636574717.

The spelling of 123851280 in words is "one hundred twenty-three million, eight hundred fifty-one thousand, two hundred eighty".