126972619 has 2 divisors, whose sum is σ = 126972620. Its totient is φ = 126972618.

The previous prime is 126972583. The next prime is 126972647. The reversal of 126972619 is 916279621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126972619 - 2⁹ = 126972107 is a prime.

It is a super-2 number, since 2×126972619² = 32244091951438322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126972689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63486309 + 63486310.

It is an arithmetic number, because the mean of its divisors is an integer number (63486310).

Almost surely, 2^126972619 is an apocalyptic number.

126972619 is a deficient number, since it is larger than the sum of its proper divisors (1).

126972619 is an equidigital number, since it uses as much as digits as its factorization.

126972619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 126972619 is about 11268.2127686692. The cubic root of 126972619 is about 502.6164432342.

The spelling of 126972619 in words is "one hundred twenty-six million, nine hundred seventy-two thousand, six hundred nineteen".