275621042 has 4 divisors (see below), whose sum is σ = 413431566. Its totient is φ = 137810520.

The previous prime is 275621009. The next prime is 275621057. The reversal of 275621042 is 240126572.

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 only one way, i.e., 139688761 + 135932281 = 11819^2 + 11659^2 .

It is a junction number, because it is equal to n+sod(n) for n = 275620996 and 275621014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68905259 + ... + 68905262.

Almost surely, 2^275621042 is an apocalyptic number.

275621042 is a deficient number, since it is larger than the sum of its proper divisors (137810524).

275621042 is a wasteful number, since it uses less digits than its factorization.

275621042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137810523.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 275621042 is about 16601.8385126467. The cubic root of 275621042 is about 650.7848838133.

The spelling of 275621042 in words is "two hundred seventy-five million, six hundred twenty-one thousand, forty-two".