261450534 has 8 divisors (see below), whose sum is σ = 522901080. Its totient is φ = 87150176.

The previous prime is 261450529. The next prime is 261450569. The reversal of 261450534 is 435054162.

It is a sphenic number, since it is the product of 3 distinct primes.

261450534 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21787539 + ... + 21787550.

It is an arithmetic number, because the mean of its divisors is an integer number (65362635).

Almost surely, 2^261450534 is an apocalyptic number.

261450534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261450534 is a wasteful number, since it uses less digits than its factorization.

261450534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43575094.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 261450534 is about 16169.4320865020. The cubic root of 261450534 is about 639.4351575602.

The spelling of 261450534 in words is "two hundred sixty-one million, four hundred fifty thousand, five hundred thirty-four".