281240602 has 4 divisors (see below), whose sum is σ = 421860906. Its totient is φ = 140620300.

The previous prime is 281240599. The next prime is 281240633. The reversal of 281240602 is 206042182.

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., 253478241 + 27762361 = 15921^2 + 5269^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70310149 + ... + 70310152.

Almost surely, 2^281240602 is an apocalyptic number.

281240602 is a deficient number, since it is larger than the sum of its proper divisors (140620304).

281240602 is a wasteful number, since it uses less digits than its factorization.

281240602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140620303.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 281240602 is about 16770.2296346830. The cubic root of 281240602 is about 655.1780507739.

Adding to 281240602 its reverse (206042182), we get a palindrome (487282784).

The spelling of 281240602 in words is "two hundred eighty-one million, two hundred forty thousand, six hundred two".