1205667 has 6 divisors (see below), whose sum is σ = 1741532. Its totient is φ = 803772.

The previous prime is 1205663. The next prime is 1205669. The reversal of 1205667 is 7665021.

It is not a de Polignac number, because 1205667 - 2² = 1205663 is a prime.

It is a Duffinian number.

1205667 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205667.

It is not an unprimeable number, because it can be changed into a prime (1205663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66973 + ... + 66990.

2^1205667 is an apocalyptic number.

1205667 is a deficient number, since it is larger than the sum of its proper divisors (535865).

1205667 is a wasteful number, since it uses less digits than its factorization.

1205667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133969 (or 133966 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1205667 is about 1098.0286881498. The cubic root of 1205667 is about 106.4328744499.

The spelling of 1205667 in words is "one million, two hundred five thousand, six hundred sixty-seven".