257454145 has 8 divisors (see below), whose sum is σ = 332710056. Its totient is φ = 190119936.

The previous prime is 257454139. The next prime is 257454187. The reversal of 257454145 is 541454752.

It can be written as a sum of positive squares in 4 ways, for example, as 2509056 + 254945089 = 1584^2 + 15967^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 257454145 - 2⁷ = 257454017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980352 + ... + 1980481.

It is an arithmetic number, because the mean of its divisors is an integer number (41588757).

Almost surely, 2^257454145 is an apocalyptic number.

It is an amenable number.

257454145 is a deficient number, since it is larger than the sum of its proper divisors (75255911).

257454145 is a wasteful number, since it uses less digits than its factorization.

257454145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960851.

The product of its digits is 112000, while the sum is 37.

The square root of 257454145 is about 16045.3776833080. The cubic root of 257454145 is about 636.1603970607.

It can be divided in two parts, 25745 and 4145, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 257454145 in words is "two hundred fifty-seven million, four hundred fifty-four thousand, one hundred forty-five".