1356641 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 1110720.

The previous prime is 1356629. The next prime is 1356643. The reversal of 1356641 is 1466531.

It is not a de Polignac number, because 1356641 - 2⁶ = 1356577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1356641.

It is not an unprimeable number, because it can be changed into a prime (1356643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7490 + ... + 7668.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1356641 is an apocalyptic number.

1356641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1356641 is a deficient number, since it is larger than the sum of its proper divisors (276319).

1356641 is a wasteful number, since it uses less digits than its factorization.

1356641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its digits is 2160, while the sum is 26.

The square root of 1356641 is about 1164.7493292550. The cubic root of 1356641 is about 110.7018756617.

It can be divided in two parts, 135 and 6641, that added together give a palindrome (6776).

The spelling of 1356641 in words is "one million, three hundred fifty-six thousand, six hundred forty-one".