126973321 has 2 divisors, whose sum is σ = 126973322. Its totient is φ = 126973320.

The previous prime is 126973277. The next prime is 126973373. The reversal of 126973321 is 123379621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 28249225 = 9936^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 126973321 - 2⁷ = 126973193 is a prime.

It is a super-2 number, since 2×126973321² = 32244448491538082, which contains 22 as substring.

It is equal to p_7215991 and since 126973321 and 7215991 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (126973921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63486660 + 63486661.

It is an arithmetic number, because the mean of its divisors is an integer number (63486661).

Almost surely, 2^126973321 is an apocalyptic number.

It is an amenable number.

126973321 is a deficient number, since it is larger than the sum of its proper divisors (1).

126973321 is an equidigital number, since it uses as much as digits as its factorization.

126973321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 126973321 is about 11268.2439181977. The cubic root of 126973321 is about 502.6173695129.

The spelling of 126973321 in words is "one hundred twenty-six million, nine hundred seventy-three thousand, three hundred twenty-one".