7212127 has 4 divisors (see below), whose sum is σ = 7766920. Its totient is φ = 6657336.

The previous prime is 7212083. The next prime is 7212157.

7212127 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7212127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7212098 and 7212107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277377 + ... + 277402.

It is an arithmetic number, because the mean of its divisors is an integer number (1941730).

Almost surely, 2^7212127 is an apocalyptic number.

7212127 is a deficient number, since it is larger than the sum of its proper divisors (554793).

7212127 is a wasteful number, since it uses less digits than its factorization.

7212127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554792.

The product of its digits is 392, while the sum is 22.

The square root of 7212127 is about 2685.5403553103. The cubic root of 7212127 is about 193.2062280540.

The spelling of 7212127 in words is "seven million, two hundred twelve thousand, one hundred twenty-seven".