1391236 has 24 divisors (see below), whose sum is σ = 3036096. Its totient is φ = 541920.

The previous prime is 1391233. The next prime is 1391239. The reversal of 1391236 is 6321931.

It is an interprime number because it is at equal distance from previous prime (1391233) and next prime (1391239).

It is a self number, because there is not a number n which added to its sum of digits gives 1391236.

It is not an unprimeable number, because it can be changed into a prime (1391233) 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, 1951 + ... + 2566.

It is an arithmetic number, because the mean of its divisors is an integer number (126504).

2^1391236 is an apocalyptic number.

It is an amenable number.

1391236 is an abundant number, since it is smaller than the sum of its proper divisors (1644860).

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

1391236 is a wasteful number, since it uses less digits than its factorization.

1391236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4537 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

The square root of 1391236 is about 1179.5066765390. The cubic root of 1391236 is about 111.6349723174.

It can be divided in two parts, 139123 and 6, that added together give a square (139129 = 373²).

The spelling of 1391236 in words is "one million, three hundred ninety-one thousand, two hundred thirty-six".