1391146 has 4 divisors (see below), whose sum is σ = 2086722. Its totient is φ = 695572.

The previous prime is 1391129. The next prime is 1391183. The reversal of 1391146 is 6411931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 57121 = 1155^2 + 239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1391146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347785 + ... + 347788.

2^1391146 is an apocalyptic number.

1391146 is a deficient number, since it is larger than the sum of its proper divisors (695576).

1391146 is an equidigital number, since it uses as much as digits as its factorization.

1391146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695575.

The product of its digits is 648, while the sum is 25.

The square root of 1391146 is about 1179.4685243787. The cubic root of 1391146 is about 111.6325650181.

The spelling of 1391146 in words is "one million, three hundred ninety-one thousand, one hundred forty-six".