1391027 has 4 divisors (see below), whose sum is σ = 1517496. Its totient is φ = 1264560.

The previous prime is 1391023. The next prime is 1391029. The reversal of 1391027 is 7201931.

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

It is not a de Polignac number, because 1391027 - 2² = 1391023 is a prime.

It is a super-2 number, since 2×1391027² = 3869912229458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390993 and 1391011.

It is not an unprimeable number, because it can be changed into a prime (1391023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63218 + ... + 63239.

It is an arithmetic number, because the mean of its divisors is an integer number (379374).

2^1391027 is an apocalyptic number.

1391027 is a deficient number, since it is larger than the sum of its proper divisors (126469).

1391027 is a wasteful number, since it uses less digits than its factorization.

1391027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126468.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1391027 is about 1179.4180768498. The cubic root of 1391027 is about 111.6293818742.

Adding to 1391027 its reverse (7201931), we get a palindrome (8592958).

The spelling of 1391027 in words is "one million, three hundred ninety-one thousand, twenty-seven".