75261 has 4 divisors (see below), whose sum is σ = 100352. Its totient is φ = 50172.

The previous prime is 75253. The next prime is 75269. The reversal of 75261 is 16257.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16257 = 3 ⋅5419.

It is an interprime number because it is at equal distance from previous prime (75253) and next prime (75269).

It is not a de Polignac number, because 75261 - 2³ = 75253 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75269) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 12541 + ... + 12546.

It is an arithmetic number, because the mean of its divisors is an integer number (25088).

2⁷⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

75261 is a deficient number, since it is larger than the sum of its proper divisors (25091).

75261 is a wasteful number, since it uses less digits than its factorization.

75261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25090.

The product of its digits is 420, while the sum is 21.

The square root of 75261 is about 274.3373835262. The cubic root of 75261 is about 42.2204957230.

The spelling of 75261 in words is "seventy-five thousand, two hundred sixty-one".