126640122 has 64 divisors (see below), whose sum is σ = 299427840. Its totient is φ = 34952256.

The previous prime is 126640121. The next prime is 126640141. The reversal of 126640122 is 221046621.

It is a junction number, because it is equal to n+sod(n) for n = 126640092 and 126640101.

It is not an unprimeable number, because it can be changed into a prime (126640121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352579 + ... + 352937.

It is an arithmetic number, because the mean of its divisors is an integer number (4678560).

Almost surely, 2^126640122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126640122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149713920).

126640122 is an abundant number, since it is smaller than the sum of its proper divisors (172787718).

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

126640122 is a wasteful number, since it uses less digits than its factorization.

126640122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 126640122 is about 11253.4493378697. The cubic root of 126640122 is about 502.1773340036.

Adding to 126640122 its reverse (221046621), we get a palindrome (347686743).

The spelling of 126640122 in words is "one hundred twenty-six million, six hundred forty thousand, one hundred twenty-two".