126601619 has 2 divisors, whose sum is σ = 126601620. Its totient is φ = 126601618.

The previous prime is 126601609. The next prime is 126601621. The reversal of 126601619 is 916106621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126601619 - 2⁴ = 126601603 is a prime.

It is a super-2 number, since 2×126601619² = 32055939866842322, which contains 22 as substring.

Together with 126601621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126601609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63300809 + 63300810.

It is an arithmetic number, because the mean of its divisors is an integer number (63300810).

Almost surely, 2^126601619 is an apocalyptic number.

126601619 is a deficient number, since it is larger than the sum of its proper divisors (1).

126601619 is an equidigital number, since it uses as much as digits as its factorization.

126601619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 126601619 is about 11251.7384878960. The cubic root of 126601619 is about 502.1264357220.

The spelling of 126601619 in words is "one hundred twenty-six million, six hundred one thousand, six hundred nineteen".