126732757 has 2 divisors, whose sum is σ = 126732758. Its totient is φ = 126732756.

The previous prime is 126732721. The next prime is 126732787. The reversal of 126732757 is 757237621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 3944196 = 11081^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 126732757 - 2⁷ = 126732629 is a prime.

It is a super-3 number, since 3×126732757³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126732787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63366378 + 63366379.

It is an arithmetic number, because the mean of its divisors is an integer number (63366379).

Almost surely, 2^126732757 is an apocalyptic number.

It is an amenable number.

126732757 is a deficient number, since it is larger than the sum of its proper divisors (1).

126732757 is an equidigital number, since it uses as much as digits as its factorization.

126732757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480, while the sum is 40.

The square root of 126732757 is about 11257.5644346368. The cubic root of 126732757 is about 502.2997487606.

The spelling of 126732757 in words is "one hundred twenty-six million, seven hundred thirty-two thousand, seven hundred fifty-seven".