126155501 has 2 divisors, whose sum is σ = 126155502. Its totient is φ = 126155500.

The previous prime is 126155479. The next prime is 126155509. The reversal of 126155501 is 105551621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 491401 = 11210^2 + 701^2 .

It is a cyclic number.

It is not a de Polignac number, because 126155501 - 2¹⁸ = 125893357 is a prime.

It is a super-2 number, since 2×126155501² = 31830420865122002, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7172180 and since 126155501 and 7172180 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126155509) 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, 63077750 + 63077751.

It is an arithmetic number, because the mean of its divisors is an integer number (63077751).

Almost surely, 2^126155501 is an apocalyptic number.

It is an amenable number.

126155501 is a deficient number, since it is larger than the sum of its proper divisors (1).

126155501 is an equidigital number, since it uses as much as digits as its factorization.

126155501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 126155501 is about 11231.8965896237. The cubic root of 126155501 is about 501.5359449151.

The spelling of 126155501 in words is "one hundred twenty-six million, one hundred fifty-five thousand, five hundred one".