1421667 has 24 divisors (see below), whose sum is σ = 2293200. Its totient is φ = 842688.

The previous prime is 1421663. The next prime is 1421669. The reversal of 1421667 is 7661241.

It is not a de Polignac number, because 1421667 - 2² = 1421663 is a prime.

It is a super-2 number, since 2×1421667² = 4042274117778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1421667.

It is not an unprimeable number, because it can be changed into a prime (1421663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3184 + ... + 3602.

It is an arithmetic number, because the mean of its divisors is an integer number (95550).

2^1421667 is an apocalyptic number.

1421667 is a deficient number, since it is larger than the sum of its proper divisors (871533).

1421667 is a wasteful number, since it uses less digits than its factorization.

1421667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 464 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1421667 is about 1192.3367812829. The cubic root of 1421667 is about 112.4430526597.

The spelling of 1421667 in words is "one million, four hundred twenty-one thousand, six hundred sixty-seven".