126165251 has 2 divisors, whose sum is σ = 126165252. Its totient is φ = 126165250.

The previous prime is 126165217. The next prime is 126165269. The reversal of 126165251 is 152561621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126165251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126162251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63082625 + 63082626.

It is an arithmetic number, because the mean of its divisors is an integer number (63082626).

Almost surely, 2^126165251 is an apocalyptic number.

126165251 is a deficient number, since it is larger than the sum of its proper divisors (1).

126165251 is an equidigital number, since it uses as much as digits as its factorization.

126165251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 126165251 is about 11232.3306130117. The cubic root of 126165251 is about 501.5488650797.

The spelling of 126165251 in words is "one hundred twenty-six million, one hundred sixty-five thousand, two hundred fifty-one".