1722126 has 32 divisors (see below), whose sum is σ = 3979008. Its totient is φ = 486720.

The previous prime is 1722113. The next prime is 1722131. The reversal of 1722126 is 6212271.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5346 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (124344).

2^1722126 is an apocalyptic number.

1722126 is an abundant number, since it is smaller than the sum of its proper divisors (2256882).

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

1722126 is a wasteful number, since it uses less digits than its factorization.

1722126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 336, while the sum is 21.

The square root of 1722126 is about 1312.2979844532. The cubic root of 1722126 is about 119.8638734158.

Adding to 1722126 its reverse (6212271), we get a palindrome (7934397).

The spelling of 1722126 in words is "one million, seven hundred twenty-two thousand, one hundred twenty-six".