1641078 has 48 divisors (see below), whose sum is σ = 3908736. Its totient is φ = 495360.

The previous prime is 1641077. The next prime is 1641089. The reversal of 1641078 is 8701461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9400 + ... + 9572.

It is an arithmetic number, because the mean of its divisors is an integer number (81432).

2^1641078 is an apocalyptic number.

1641078 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 1641078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1954368).

1641078 is an abundant number, since it is smaller than the sum of its proper divisors (2267658).

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

1641078 is a wasteful number, since it uses less digits than its factorization.

1641078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1641078 is about 1281.0456666333. The cubic root of 1641078 is about 117.9532036982.

The spelling of 1641078 in words is "one million, six hundred forty-one thousand, seventy-eight".