1212009 has 16 divisors (see below), whose sum is σ = 1696320. Its totient is φ = 768960.

The previous prime is 1211999. The next prime is 1212011. The reversal of 1212009 is 9002121.

It is a happy number.

It is not a de Polignac number, because 1212009 - 2¹³ = 1203817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6682 + ... + 6860.

It is an arithmetic number, because the mean of its divisors is an integer number (106020).

2^1212009 is an apocalyptic number.

It is an amenable number.

1212009 is a deficient number, since it is larger than the sum of its proper divisors (484311).

1212009 is a wasteful number, since it uses less digits than its factorization.

1212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1212009 is about 1100.9128030866. The cubic root of 1212009 is about 106.6191661333.

It can be divided in two parts, 12 and 12009, that added together give a palindrome (12021).

The spelling of 1212009 in words is "one million, two hundred twelve thousand, nine".