1406217 has 4 divisors (see below), whose sum is σ = 1874960. Its totient is φ = 937476.

The previous prime is 1406213. The next prime is 1406221. The reversal of 1406217 is 7126041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1406213) and next prime (1406221).

It is not a de Polignac number, because 1406217 - 2² = 1406213 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1406193 and 1406202.

It is not an unprimeable number, because it can be changed into a prime (1406213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234367 + ... + 234372.

It is an arithmetic number, because the mean of its divisors is an integer number (468740).

2^1406217 is an apocalyptic number.

It is an amenable number.

1406217 is a deficient number, since it is larger than the sum of its proper divisors (468743).

1406217 is an equidigital number, since it uses as much as digits as its factorization.

1406217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468742.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1406217 is about 1185.8402084598. The cubic root of 1406217 is about 112.0342422935.

The spelling of 1406217 in words is "one million, four hundred six thousand, two hundred seventeen".