1712121 has 16 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 1054208.

The previous prime is 1712077. The next prime is 1712129. The reversal of 1712121 is 1212171.

It is a cyclic number.

It is not a de Polignac number, because 1712121 - 2⁶ = 1712057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1712121.

It is not an unprimeable number, because it can be changed into a prime (1712129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2725 + ... + 3293.

It is an arithmetic number, because the mean of its divisors is an integer number (153900).

2^1712121 is an apocalyptic number.

It is an amenable number.

1712121 is a deficient number, since it is larger than the sum of its proper divisors (750279).

1712121 is a wasteful number, since it uses less digits than its factorization.

1712121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 28, while the sum is 15.

The square root of 1712121 is about 1308.4804163609. The cubic root of 1712121 is about 119.6312988781.

Adding to 1712121 its reverse (1212171), we get a palindrome (2924292).

The spelling of 1712121 in words is "one million, seven hundred twelve thousand, one hundred twenty-one".