126777401 has 2 divisors, whose sum is σ = 126777402. Its totient is φ = 126777400.

The previous prime is 126777379. The next prime is 126777439. The reversal of 126777401 is 104777621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116208400 + 10569001 = 10780^2 + 3251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126777401 is a prime.

It is not a weakly prime, because it can be changed into another prime (126777461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63388700 + 63388701.

It is an arithmetic number, because the mean of its divisors is an integer number (63388701).

Almost surely, 2^126777401 is an apocalyptic number.

It is an amenable number.

126777401 is a deficient number, since it is larger than the sum of its proper divisors (1).

126777401 is an equidigital number, since it uses as much as digits as its factorization.

126777401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 126777401 is about 11259.5471045686. The cubic root of 126777401 is about 502.3587233511.

The spelling of 126777401 in words is "one hundred twenty-six million, seven hundred seventy-seven thousand, four hundred one".