1390217 has 4 divisors (see below), whose sum is σ = 1413840. Its totient is φ = 1366596.

The previous prime is 1390199. The next prime is 1390219. The reversal of 1390217 is 7120931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7120931 = 73 ⋅97547.

It is a cyclic number.

It is not a de Polignac number, because 1390217 - 2⁸ = 1389961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390192 and 1390201.

It is not an unprimeable number, because it can be changed into a prime (1390219) 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, 11723 + ... + 11840.

It is an arithmetic number, because the mean of its divisors is an integer number (353460).

2^1390217 is an apocalyptic number.

It is an amenable number.

1390217 is a deficient number, since it is larger than the sum of its proper divisors (23623).

1390217 is an equidigital number, since it uses as much as digits as its factorization.

1390217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23622.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1390217 is about 1179.0746371626. The cubic root of 1390217 is about 111.6077102709.

The spelling of 1390217 in words is "one million, three hundred ninety thousand, two hundred seventeen".