126891701 has 2 divisors, whose sum is σ = 126891702. Its totient is φ = 126891700.

The previous prime is 126891673. The next prime is 126891707. The reversal of 126891701 is 107198621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108701476 + 18190225 = 10426^2 + 4265^2 .

It is an emirp because it is prime and its reverse (107198621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126891701 - 2¹⁰ = 126890677 is a prime.

It is a super-2 number, since 2×126891701² = 32203007565346802, 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 (126891707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63445850 + 63445851.

It is an arithmetic number, because the mean of its divisors is an integer number (63445851).

Almost surely, 2^126891701 is an apocalyptic number.

It is an amenable number.

126891701 is a deficient number, since it is larger than the sum of its proper divisors (1).

126891701 is an equidigital number, since it uses as much as digits as its factorization.

126891701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 126891701 is about 11264.6216536553. The cubic root of 126891701 is about 502.5096502359.

The spelling of 126891701 in words is "one hundred twenty-six million, eight hundred ninety-one thousand, seven hundred one".