654381261 has 48 divisors (see below), whose sum is σ = 1037603840. Its totient is φ = 410981040.

The previous prime is 654381241. The next prime is 654381269. The reversal of 654381261 is 162183456.

It is a happy number.

It is not a de Polignac number, because 654381261 - 2¹¹ = 654379213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654381269) 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 47 ways as a sum of consecutive naturals, for example, 1250946 + ... + 1251468.

Almost surely, 2^654381261 is an apocalyptic number.

It is an amenable number.

654381261 is a deficient number, since it is larger than the sum of its proper divisors (383222579).

654381261 is a wasteful number, since it uses less digits than its factorization.

654381261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 816 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 654381261 is about 25580.8768614369. The cubic root of 654381261 is about 868.1810152362.

The spelling of 654381261 in words is "six hundred fifty-four million, three hundred eighty-one thousand, two hundred sixty-one".