123020530 has 16 divisors (see below), whose sum is σ = 225068184. Its totient is φ = 48401280.

The previous prime is 123020507. The next prime is 123020533. The reversal of 123020530 is 35020321.

It can be written as a sum of positive squares in 4 ways, for example, as 21353641 + 101666889 = 4621^2 + 10083^2 .

It is not an unprimeable number, because it can be changed into a prime (123020533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100227 + ... + 101446.

Almost surely, 2^123020530 is an apocalyptic number.

123020530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123020530 is a deficient number, since it is larger than the sum of its proper divisors (102047654).

123020530 is a wasteful number, since it uses less digits than its factorization.

123020530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201741.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 123020530 is about 11091.4620316710. The cubic root of 123020530 is about 497.3466510524.

Adding to 123020530 its reverse (35020321), we get a palindrome (158040851).

The spelling of 123020530 in words is "one hundred twenty-three million, twenty thousand, five hundred thirty".