1390609 has 8 divisors (see below), whose sum is σ = 1528128. Its totient is φ = 1254960.

The previous prime is 1390607. The next prime is 1390619. The reversal of 1390609 is 9060931.

It is a happy number.

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 1390609 - 2¹ = 1390607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390601) 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, 1459 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (191016).

2^1390609 is an apocalyptic number.

It is an amenable number.

1390609 is a deficient number, since it is larger than the sum of its proper divisors (137519).

1390609 is a wasteful number, since it uses less digits than its factorization.

1390609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 1390609 is about 1179.2408575011. The cubic root of 1390609 is about 111.6181993075.

The spelling of 1390609 in words is "one million, three hundred ninety thousand, six hundred nine".