123282421 has 2 divisors, whose sum is σ = 123282422. Its totient is φ = 123282420.

The previous prime is 123282391. The next prime is 123282427. The reversal of 123282421 is 124282321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110040100 + 13242321 = 10490^2 + 3639^2 .

It is a cyclic number.

It is not a de Polignac number, because 123282421 - 2⁵ = 123282389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123282427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61641210 + 61641211.

It is an arithmetic number, because the mean of its divisors is an integer number (61641211).

Almost surely, 2^123282421 is an apocalyptic number.

It is an amenable number.

123282421 is a deficient number, since it is larger than the sum of its proper divisors (1).

123282421 is an equidigital number, since it uses as much as digits as its factorization.

123282421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

The square root of 123282421 is about 11103.2617279789. The cubic root of 123282421 is about 497.6993246899.

The spelling of 123282421 in words is "one hundred twenty-three million, two hundred eighty-two thousand, four hundred twenty-one".