1356642 has 64 divisors (see below), whose sum is σ = 3575040. Its totient is φ = 373248.

The previous prime is 1356629. The next prime is 1356643. The reversal of 1356642 is 2466531.

1356642 is a `hidden beast` number, since 13 + 5 + 6 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

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 31 ways as a sum of consecutive naturals, for example, 13938 + ... + 14034.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2^1356642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787520).

1356642 is an abundant number, since it is smaller than the sum of its proper divisors (2218398).

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

1356642 is a wasteful number, since it uses less digits than its factorization.

1356642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 146 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1356642 is about 1164.7497585318. The cubic root of 1356642 is about 110.7019028617.

The spelling of 1356642 in words is "one million, three hundred fifty-six thousand, six hundred forty-two".