611381 has 8 divisors (see below), whose sum is σ = 633600. Its totient is φ = 589680.

The previous prime is 611333. The next prime is 611389. The reversal of 611381 is 183116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611381 is a prime.

It is a super-2 number, since 2×611381² = 747573454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 611381.

It is not an unprimeable number, because it can be changed into a prime (611389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (79200).

2⁶¹¹³⁸¹ is an apocalyptic number.

It is an amenable number.

611381 is a deficient number, since it is larger than the sum of its proper divisors (22219).

611381 is a wasteful number, since it uses less digits than its factorization.

611381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its digits is 144, while the sum is 20.

The square root of 611381 is about 781.9085624291. The cubic root of 611381 is about 84.8732135161.

Adding to 611381 its reverse (183116), we get a palindrome (794497).

It can be divided in two parts, 6 and 11381, that multiplied together give a palindrome (68286).

The spelling of 611381 in words is "six hundred eleven thousand, three hundred eighty-one".