378261 has 24 divisors (see below), whose sum is σ = 609336. Its totient is φ = 224640.

The previous prime is 378253. The next prime is 378269. The reversal of 378261 is 162873.

It is an interprime number because it is at equal distance from previous prime (378253) and next prime (378269).

It can be written as a sum of positive squares in 4 ways, for example, as 36 + 378225 = 6^2 + 615^2 .

It is not a de Polignac number, because 378261 - 2³ = 378253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378269) 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, 6171 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (25389).

2³⁷⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

378261 is a deficient number, since it is larger than the sum of its proper divisors (231075).

378261 is a wasteful number, since it uses less digits than its factorization.

378261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 130 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 378261 is about 615.0292675963. The cubic root of 378261 is about 72.3209055550.

The spelling of 378261 in words is "three hundred seventy-eight thousand, two hundred sixty-one".