1242171 has 12 divisors (see below), whose sum is σ = 2050672. Its totient is φ = 709776.

The previous prime is 1242169. The next prime is 1242181. The reversal of 1242171 is 1712421.

It is not a de Polignac number, because 1242171 - 2¹ = 1242169 is a prime.

It is a Duffinian number.

1242171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1242121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9796 + ... + 9921.

2^1242171 is an apocalyptic number.

1242171 is a deficient number, since it is larger than the sum of its proper divisors (808501).

1242171 is a wasteful number, since it uses less digits than its factorization.

1242171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19730 (or 19727 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1242171 is about 1114.5272540409. The cubic root of 1242171 is about 107.4963690859.

Adding to 1242171 its reverse (1712421), we get a palindrome (2954592).

The spelling of 1242171 in words is "one million, two hundred forty-two thousand, one hundred seventy-one".