1206390 has 16 divisors (see below), whose sum is σ = 2895408. Its totient is φ = 321696.

The previous prime is 1206383. The next prime is 1206391. The reversal of 1206390 is 936021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206391) 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, 20077 + ... + 20136.

It is an arithmetic number, because the mean of its divisors is an integer number (180963).

2^1206390 is an apocalyptic number.

1206390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1206390 is an abundant number, since it is smaller than the sum of its proper divisors (1689018).

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

1206390 is a wasteful number, since it uses less digits than its factorization.

1206390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40223.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1206390 is about 1098.3578651787. The cubic root of 1206390 is about 106.4541449974.

It can be divided in two parts, 1206 and 390, that added together give a triangular number (1596 = T₅₆).

The spelling of 1206390 in words is "one million, two hundred six thousand, three hundred ninety".