123302540 has 24 divisors (see below), whose sum is σ = 270194400. Its totient is φ = 47176448.

The previous prime is 123302527. The next prime is 123302551. The reversal of 123302540 is 45203321.

It is a happy number.

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

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, 133565 + ... + 134484.

It is an arithmetic number, because the mean of its divisors is an integer number (11258100).

Almost surely, 2^123302540 is an apocalyptic number.

123302540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123302540 is an abundant number, since it is smaller than the sum of its proper divisors (146891860).

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

123302540 is a wasteful number, since it uses less digits than its factorization.

123302540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268081 (or 268079 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 123302540 is about 11104.1676860537. The cubic root of 123302540 is about 497.7263971305.

Adding to 123302540 its reverse (45203321), we get a palindrome (168505861).

The spelling of 123302540 in words is "one hundred twenty-three million, three hundred two thousand, five hundred forty".