275249642 has 4 divisors (see below), whose sum is σ = 412874466. Its totient is φ = 137624820.

The previous prime is 275249621. The next prime is 275249659. The reversal of 275249642 is 246942572.

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

It can be written as a sum of positive squares in only one way, i.e., 156025081 + 119224561 = 12491^2 + 10919^2 .

It is a super-2 number, since 2×275249642² = 151524730842256328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 275249642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68812409 + ... + 68812412.

Almost surely, 2^275249642 is an apocalyptic number.

275249642 is a deficient number, since it is larger than the sum of its proper divisors (137624824).

275249642 is a wasteful number, since it uses less digits than its factorization.

275249642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137624823.

The product of its digits is 241920, while the sum is 41.

The square root of 275249642 is about 16590.6492338305. The cubic root of 275249642 is about 650.4924410329.

The spelling of 275249642 in words is "two hundred seventy-five million, two hundred forty-nine thousand, six hundred forty-two".