126131501 has 2 divisors, whose sum is σ = 126131502. Its totient is φ = 126131500.

The previous prime is 126131497. The next prime is 126131567. The reversal of 126131501 is 105131621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 10569001 = 10750^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 126131501 - 2² = 126131497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126139501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63065750 + 63065751.

It is an arithmetic number, because the mean of its divisors is an integer number (63065751).

Almost surely, 2^126131501 is an apocalyptic number.

It is an amenable number.

126131501 is a deficient number, since it is larger than the sum of its proper divisors (1).

126131501 is an equidigital number, since it uses as much as digits as its factorization.

126131501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 126131501 is about 11230.8281529013. The cubic root of 126131501 is about 501.5041385968.

The spelling of 126131501 in words is "one hundred twenty-six million, one hundred thirty-one thousand, five hundred one".