126261869 has 2 divisors, whose sum is σ = 126261870. Its totient is φ = 126261868.

The previous prime is 126261857. The next prime is 126261917. The reversal of 126261869 is 968162621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84400969 + 41860900 = 9187^2 + 6470^2 .

It is a cyclic number.

It is not a de Polignac number, because 126261869 - 2¹² = 126257773 is a prime.

It is a super-2 number, since 2×126261869² = 31884119126746322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126261809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63130934 + 63130935.

It is an arithmetic number, because the mean of its divisors is an integer number (63130935).

Almost surely, 2^126261869 is an apocalyptic number.

It is an amenable number.

126261869 is a deficient number, since it is larger than the sum of its proper divisors (1).

126261869 is an equidigital number, since it uses as much as digits as its factorization.

126261869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 126261869 is about 11236.6306782772. The cubic root of 126261869 is about 501.6768619810.

The spelling of 126261869 in words is "one hundred twenty-six million, two hundred sixty-one thousand, eight hundred sixty-nine".