257194642 has 8 divisors (see below), whose sum is σ = 391550256. Its totient is φ = 126677892.

The previous prime is 257194607. The next prime is 257194661. The reversal of 257194642 is 246491752.

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

It is a super-2 number, since 2×257194642² = 132298167747016328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257194595 and 257194604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959548 + ... + 959815.

It is an arithmetic number, because the mean of its divisors is an integer number (48943782).

Almost surely, 2^257194642 is an apocalyptic number.

257194642 is a deficient number, since it is larger than the sum of its proper divisors (134355614).

257194642 is a wasteful number, since it uses less digits than its factorization.

257194642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919432.

The product of its digits is 120960, while the sum is 40.

The square root of 257194642 is about 16037.2891100709. The cubic root of 257194642 is about 635.9465841905.

The spelling of 257194642 in words is "two hundred fifty-seven million, one hundred ninety-four thousand, six hundred forty-two".