126331501 has 2 divisors, whose sum is σ = 126331502. Its totient is φ = 126331500.

The previous prime is 126331493. The next prime is 126331519. The reversal of 126331501 is 105133621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 106276 = 11235^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 126331501 - 2³ = 126331493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126331531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63165750 + 63165751.

It is an arithmetic number, because the mean of its divisors is an integer number (63165751).

Almost surely, 2^126331501 is an apocalyptic number.

It is an amenable number.

126331501 is a deficient number, since it is larger than the sum of its proper divisors (1).

126331501 is an equidigital number, since it uses as much as digits as its factorization.

126331501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 126331501 is about 11239.7286888964. The cubic root of 126331501 is about 501.7690680809.

The spelling of 126331501 in words is "one hundred twenty-six million, three hundred thirty-one thousand, five hundred one".