265850842 has 4 divisors (see below), whose sum is σ = 398776266. Its totient is φ = 132925420.

The previous prime is 265850839. The next prime is 265850843. The reversal of 265850842 is 248058562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248058562 = 2 ⋅124029281.

It can be written as a sum of positive squares in only one way, i.e., 197936761 + 67914081 = 14069^2 + 8241^2 .

It is a junction number, because it is equal to n+sod(n) for n = 265850795 and 265850804.

It is not an unprimeable number, because it can be changed into a prime (265850843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66462709 + ... + 66462712.

Almost surely, 2^265850842 is an apocalyptic number.

265850842 is a deficient number, since it is larger than the sum of its proper divisors (132925424).

265850842 is a wasteful number, since it uses less digits than its factorization.

265850842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132925423.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 265850842 is about 16304.9330572070. The cubic root of 265850842 is about 643.0025275086.

The spelling of 265850842 in words is "two hundred sixty-five million, eight hundred fifty thousand, eight hundred forty-two".