126860221 has 2 divisors, whose sum is σ = 126860222. Its totient is φ = 126860220.

The previous prime is 126860197. The next prime is 126860233. The reversal of 126860221 is 122068621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 16924996 = 10485^2 + 4114^2 .

It is an emirp because it is prime and its reverse (122068621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126860221 - 2⁹ = 126859709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126860221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126860281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63430110 + 63430111.

It is an arithmetic number, because the mean of its divisors is an integer number (63430111).

Almost surely, 2^126860221 is an apocalyptic number.

It is an amenable number.

126860221 is a deficient number, since it is larger than the sum of its proper divisors (1).

126860221 is an equidigital number, since it uses as much as digits as its factorization.

126860221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 126860221 is about 11263.2242719392. The cubic root of 126860221 is about 502.4680916679.

The spelling of 126860221 in words is "one hundred twenty-six million, eight hundred sixty thousand, two hundred twenty-one".