126640002 has 48 divisors (see below), whose sum is σ = 265057920. Its totient is φ = 40316640.

The previous prime is 126639973. The next prime is 126640009. The reversal of 126640002 is 200046621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126640009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1602999 + ... + 1603077.

It is an arithmetic number, because the mean of its divisors is an integer number (5522040).

Almost surely, 2^126640002 is an apocalyptic number.

126640002 is an abundant number, since it is smaller than the sum of its proper divisors (138417918).

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

126640002 is an equidigital number, since it uses as much as digits as its factorization.

126640002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 126640002 is about 11253.4440061698. Note that the first 3 decimals coincide. The cubic root of 126640002 is about 502.1771753880.

Adding to 126640002 its reverse (200046621), we get a palindrome (326686623).

The spelling of 126640002 in words is "one hundred twenty-six million, six hundred forty thousand, two".