126881537 has 2 divisors, whose sum is σ = 126881538. Its totient is φ = 126881536.

The previous prime is 126881507. The next prime is 126881539. The reversal of 126881537 is 735188621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121198081 + 5683456 = 11009^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 126881537 - 2¹² = 126877441 is a prime.

Together with 126881539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126881494 and 126881503.

It is not a weakly prime, because it can be changed into another prime (126881539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63440768 + 63440769.

It is an arithmetic number, because the mean of its divisors is an integer number (63440769).

Almost surely, 2^126881537 is an apocalyptic number.

It is an amenable number.

126881537 is a deficient number, since it is larger than the sum of its proper divisors (1).

126881537 is an equidigital number, since it uses as much as digits as its factorization.

126881537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 126881537 is about 11264.1704976443. The cubic root of 126881537 is about 502.4962329033.

The spelling of 126881537 in words is "one hundred twenty-six million, eight hundred eighty-one thousand, five hundred thirty-seven".