1353978 has 48 divisors (see below), whose sum is σ = 3201120. Its totient is φ = 412128.

The previous prime is 1353977. The next prime is 1353983. The reversal of 1353978 is 8793531.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

Its product of digits (22680) is a multiple of the sum of its prime divisors (168).

It is not an unprimeable number, because it can be changed into a prime (1353973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12601 + ... + 12707.

It is an arithmetic number, because the mean of its divisors is an integer number (66690).

2^1353978 is an apocalyptic number.

1353978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1353978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600560).

1353978 is an abundant number, since it is smaller than the sum of its proper divisors (1847142).

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

1353978 is a wasteful number, since it uses less digits than its factorization.

1353978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 168 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1353978 is about 1163.6056032866. The cubic root of 1353978 is about 110.6293946353.

The spelling of 1353978 in words is "one million, three hundred fifty-three thousand, nine hundred seventy-eight".