1391355 has 36 divisors (see below), whose sum is σ = 2809872. Its totient is φ = 635040.

The previous prime is 1391353. The next prime is 1391363. The reversal of 1391355 is 5531931.

It is not a de Polignac number, because 1391355 - 2¹ = 1391353 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1391353) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1890 + ... + 2520.

It is an arithmetic number, because the mean of its divisors is an integer number (78052).

2^1391355 is an apocalyptic number.

1391355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1391355 is an abundant number, since it is smaller than the sum of its proper divisors (1418517).

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

1391355 is a wasteful number, since it uses less digits than its factorization.

1391355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 646 counting only the distinct ones).

The product of its digits is 2025, while the sum is 27.

The square root of 1391355 is about 1179.5571202786. The cubic root of 1391355 is about 111.6381551426.

The spelling of 1391355 in words is "one million, three hundred ninety-one thousand, three hundred fifty-five".