126787636 has 6 divisors (see below), whose sum is σ = 221878370. Its totient is φ = 63393816.

The previous prime is 126787631. The next prime is 126787657. The reversal of 126787636 is 636787621.

It can be written as a sum of positive squares in only one way, i.e., 126787600 + 36 = 11260^2 + 6^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126787631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15848451 + ... + 15848458.

Almost surely, 2^126787636 is an apocalyptic number.

It is an amenable number.

126787636 is a deficient number, since it is larger than the sum of its proper divisors (95090734).

126787636 is a wasteful number, since it uses less digits than its factorization.

126787636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31696913 (or 31696911 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 126787636 is about 11260.0015985789. The cubic root of 126787636 is about 502.3722418045.

It can be divided in two parts, 1267876 and 36, that multiplied together give a square (45643536 = 6756²).

The spelling of 126787636 in words is "one hundred twenty-six million, seven hundred eighty-seven thousand, six hundred thirty-six".