1641381 has 16 divisors (see below), whose sum is σ = 2555904. Its totient is φ = 917424.

The previous prime is 1641379. The next prime is 1641389. The reversal of 1641381 is 1831461.

It is not a de Polignac number, because 1641381 - 2¹ = 1641379 is a prime.

It is a super-2 number, since 2×1641381² = 5388263174322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641389) 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, 156 + ... + 1818.

It is an arithmetic number, because the mean of its divisors is an integer number (159744).

2^1641381 is an apocalyptic number.

It is an amenable number.

1641381 is a deficient number, since it is larger than the sum of its proper divisors (914523).

1641381 is a wasteful number, since it uses less digits than its factorization.

1641381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its digits is 576, while the sum is 24.

The square root of 1641381 is about 1281.1639239379. The cubic root of 1641381 is about 117.9604626709.

The spelling of 1641381 in words is "one million, six hundred forty-one thousand, three hundred eighty-one".