1390506 has 16 divisors (see below), whose sum is σ = 2995104. Its totient is φ = 427824.

The previous prime is 1390489. The next prime is 1390507. The reversal of 1390506 is 6050931.

It is not an unprimeable number, because it can be changed into a prime (1390507) 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, 8836 + ... + 8991.

It is an arithmetic number, because the mean of its divisors is an integer number (187194).

2^1390506 is an apocalyptic number.

1390506 is an abundant number, since it is smaller than the sum of its proper divisors (1604598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390506 is a wasteful number, since it uses less digits than its factorization.

1390506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17845.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 1390506 is about 1179.1971845285. The cubic root of 1390506 is about 111.6154434506.

The spelling of 1390506 in words is "one million, three hundred ninety thousand, five hundred six".