126645 has 8 divisors (see below), whose sum is σ = 202656. Its totient is φ = 67536.

The previous prime is 126641. The next prime is 126653. The reversal of 126645 is 546621.

126645 = 108² + 109² + ... + 117².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126645 - 2² = 126641 is a prime.

126645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4207 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (25332).

2¹²⁶⁶⁴⁵ is an apocalyptic number.

126645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126645 is a deficient number, since it is larger than the sum of its proper divisors (76011).

126645 is an equidigital number, since it uses as much as digits as its factorization.

126645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8451.

The product of its digits is 1440, while the sum is 24.

The square root of 126645 is about 355.8721680604. The cubic root of 126645 is about 50.2183781643.

Subtracting from 126645 its sum of digits (24), we obtain a palindrome (126621).

The spelling of 126645 in words is "one hundred twenty-six thousand, six hundred forty-five".