1218071 has 4 divisors (see below), whose sum is σ = 1282200. Its totient is φ = 1153944.

The previous prime is 1218043. The next prime is 1218089. The reversal of 1218071 is 1708121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1708121 = 47 ⋅36343.

It is a cyclic number.

It is not a de Polignac number, because 1218071 - 2¹⁴ = 1201687 is a prime.

It is a super-2 number, since 2×1218071² = 2967393922082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218571) 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, 32036 + ... + 32073.

It is an arithmetic number, because the mean of its divisors is an integer number (320550).

2^1218071 is an apocalyptic number.

1218071 is a deficient number, since it is larger than the sum of its proper divisors (64129).

1218071 is an equidigital number, since it uses as much as digits as its factorization.

1218071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64128.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1218071 is about 1103.6625390037. The cubic root of 1218071 is about 106.7966265352.

It can be divided in two parts, 121 and 8071, that added together give a 13-th power (8192 = 2¹³).

The spelling of 1218071 in words is "one million, two hundred eighteen thousand, seventy-one".