126400501 has 2 divisors, whose sum is σ = 126400502. Its totient is φ = 126400500.

The previous prime is 126400489. The next prime is 126400507. The reversal of 126400501 is 105004621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 61999876 = 8025^2 + 7874^2 .

It is a cyclic number.

It is not a de Polignac number, because 126400501 - 2¹¹ = 126398453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126400507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63200250 + 63200251.

It is an arithmetic number, because the mean of its divisors is an integer number (63200251).

Almost surely, 2^126400501 is an apocalyptic number.

It is an amenable number.

126400501 is a deficient number, since it is larger than the sum of its proper divisors (1).

126400501 is an equidigital number, since it uses as much as digits as its factorization.

126400501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 126400501 is about 11242.7977389972. The cubic root of 126400501 is about 501.8604038761.

The spelling of 126400501 in words is "one hundred twenty-six million, four hundred thousand, five hundred one".