265720534 has 4 divisors (see below), whose sum is σ = 398580804. Its totient is φ = 132860266.

The previous prime is 265720501. The next prime is 265720583. The reversal of 265720534 is 435027562.

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

It is a self number, because there is not a number n which added to its sum of digits gives 265720534.

It is a congruent number.

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, 66430132 + ... + 66430135.

It is an arithmetic number, because the mean of its divisors is an integer number (99645201).

Almost surely, 2^265720534 is an apocalyptic number.

265720534 is a deficient number, since it is larger than the sum of its proper divisors (132860270).

265720534 is a wasteful number, since it uses less digits than its factorization.

265720534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132860269.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 265720534 is about 16300.9365988584. The cubic root of 265720534 is about 642.8974534676.

The spelling of 265720534 in words is "two hundred sixty-five million, seven hundred twenty thousand, five hundred thirty-four".