1212971 has 4 divisors (see below), whose sum is σ = 1245792. Its totient is φ = 1180152.

The previous prime is 1212943. The next prime is 1212973. The reversal of 1212971 is 1792121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1212971 - 2⁶ = 1212907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16355 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (311448).

2^1212971 is an apocalyptic number.

1212971 is a deficient number, since it is larger than the sum of its proper divisors (32821).

1212971 is an equidigital number, since it uses as much as digits as its factorization.

1212971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32820.

The product of its digits is 252, while the sum is 23.

The square root of 1212971 is about 1101.3496265946. The cubic root of 1212971 is about 106.6473673851.

The spelling of 1212971 in words is "one million, two hundred twelve thousand, nine hundred seventy-one".