1212005 has 8 divisors (see below), whose sum is σ = 1462272. Its totient is φ = 964368.

The previous prime is 1211999. The next prime is 1212011. The reversal of 1212005 is 5002121.

It is an interprime number because it is at equal distance from previous prime (1211999) and next prime (1212011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212005 - 2¹² = 1207909 is a prime.

It is a super-2 number, since 2×1212005² = 2937912240050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (182784).

2^1212005 is an apocalyptic number.

It is an amenable number.

1212005 is a deficient number, since it is larger than the sum of its proper divisors (250267).

1212005 is a wasteful number, since it uses less digits than its factorization.

1212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1212005 is about 1100.9109864108. The cubic root of 1212005 is about 106.6190488412.

Adding to 1212005 its reverse (5002121), we get a palindrome (6214126).

The spelling of 1212005 in words is "one million, two hundred twelve thousand, five".