257140049 has 4 divisors (see below), whose sum is σ = 257451060. Its totient is φ = 256829040.

The previous prime is 257140033. The next prime is 257140057. The reversal of 257140049 is 940041752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90859024 + 166281025 = 9532^2 + 12895^2 .

It is a cyclic number.

It is not a de Polignac number, because 257140049 - 2⁴ = 257140033 is a prime.

It is a super-2 number, since 2×257140049² = 132242009599444802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257139997 and 257140024.

It is not an unprimeable number, because it can be changed into a prime (257140549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154262 + ... + 155919.

It is an arithmetic number, because the mean of its divisors is an integer number (64362765).

Almost surely, 2^257140049 is an apocalyptic number.

It is an amenable number.

257140049 is a deficient number, since it is larger than the sum of its proper divisors (311011).

257140049 is an equidigital number, since it uses as much as digits as its factorization.

257140049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311010.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 257140049 is about 16035.5869552692. The cubic root of 257140049 is about 635.9015849526.

The spelling of 257140049 in words is "two hundred fifty-seven million, one hundred forty thousand, forty-nine".