263157842 has 4 divisors (see below), whose sum is σ = 394736766. Its totient is φ = 131578920.

The previous prime is 263157827. The next prime is 263157857. The reversal of 263157842 is 248751362.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (263157827) and next prime (263157857).

It can be written as a sum of positive squares in only one way, i.e., 247149841 + 16008001 = 15721^2 + 4001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 263157796 and 263157805.

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, 65789459 + ... + 65789462.

Almost surely, 2^263157842 is an apocalyptic number.

263157842 is a deficient number, since it is larger than the sum of its proper divisors (131578924).

263157842 is a wasteful number, since it uses less digits than its factorization.

263157842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131578923.

The product of its digits is 80640, while the sum is 38.

The square root of 263157842 is about 16222.1404876175. The cubic root of 263157842 is about 640.8240053627.

The spelling of 263157842 in words is "two hundred sixty-three million, one hundred fifty-seven thousand, eight hundred forty-two".