126640026 has 24 divisors (see below), whose sum is σ = 278887284. Its totient is φ = 41520960.

The previous prime is 126640009. The next prime is 126640027. The reversal of 126640026 is 620046621.

It is a happy number.

126640026 is a `hidden beast` number, since 12 + 6 + 640 + 0 + 2 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 124344801 + 2295225 = 11151^2 + 1515^2 .

It is not an unprimeable number, because it can be changed into a prime (126640027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56571 + ... + 58766.

Almost surely, 2^126640026 is an apocalyptic number.

126640026 is an abundant number, since it is smaller than the sum of its proper divisors (152247258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126640026 is a wasteful number, since it uses less digits than its factorization.

126640026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115406 (or 115403 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 126640026 is about 11253.4450725100. The cubic root of 126640026 is about 502.1772071111.

Adding to 126640026 its reverse (620046621), we get a palindrome (746686647).

The spelling of 126640026 in words is "one hundred twenty-six million, six hundred forty thousand, twenty-six".