1213667 has 8 divisors (see below), whose sum is σ = 1493856. Its totient is φ = 960192.

The previous prime is 1213661. The next prime is 1213673. The reversal of 1213667 is 7663121.

It is an interprime number because it is at equal distance from previous prime (1213661) and next prime (1213673).

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 1213667 - 2⁴ = 1213651 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6578 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (186732).

2^1213667 is an apocalyptic number.

1213667 is a deficient number, since it is larger than the sum of its proper divisors (280189).

1213667 is a wasteful number, since it uses less digits than its factorization.

1213667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357.

The product of its digits is 1512, while the sum is 26.

The square root of 1213667 is about 1101.6655572360. The cubic root of 1213667 is about 106.6677614905.

Adding to 1213667 its reverse (7663121), we get a palindrome (8876788).

The spelling of 1213667 in words is "one million, two hundred thirteen thousand, six hundred sixty-seven".