12542921 has 2 divisors, whose sum is σ = 12542922. Its totient is φ = 12542920.

The previous prime is 12542917. The next prime is 12542939. The reversal of 12542921 is 12924521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 2689600 = 3139^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 12542921 - 2² = 12542917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12542911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271460 + 6271461.

It is an arithmetic number, because the mean of its divisors is an integer number (6271461).

Almost surely, 2^12542921 is an apocalyptic number.

It is an amenable number.

12542921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542921 is an equidigital number, since it uses as much as digits as its factorization.

12542921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 12542921 is about 3541.5986503273. The cubic root of 12542921 is about 232.3447670769.

The spelling of 12542921 in words is "twelve million, five hundred forty-two thousand, nine hundred twenty-one".