654381 has 48 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 317952.

The previous prime is 654371. The next prime is 654397. The reversal of 654381 is 183456.

654381 is a `hidden beast` number, since 654 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 654381 - 2⁵ = 654349 is a prime.

It is a super-2 number, since 2×654381² = 856428986322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

Its product of digits (2880) is a multiple of the sum of its prime factors (90).

654381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13900 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2⁶⁵⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

654381 is a deficient number, since it is larger than the sum of its proper divisors (603603).

654381 is a wasteful number, since it uses less digits than its factorization.

654381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 87 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 654381 is about 808.9381929418. The cubic root of 654381 is about 86.8180899812.

It can be divided in two parts, 654 and 381, that added together give a triangular number (1035 = T₄₅).

The spelling of 654381 in words is "six hundred fifty-four thousand, three hundred eighty-one".