105561257 has 4 divisors (see below), whose sum is σ = 106392576. Its totient is φ = 104729940.

The previous prime is 105561233. The next prime is 105561263. The reversal of 105561257 is 752165501.

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.

It is a cyclic number.

It is not a de Polignac number, because 105561257 - 2¹⁰ = 105560233 is a prime.

It is a super-2 number, since 2×105561257² = 22286357958840098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105561227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415469 + ... + 415722.

It is an arithmetic number, because the mean of its divisors is an integer number (26598144).

Almost surely, 2^105561257 is an apocalyptic number.

It is an amenable number.

105561257 is a deficient number, since it is larger than the sum of its proper divisors (831319).

105561257 is an equidigital number, since it uses as much as digits as its factorization.

105561257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831318.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 105561257 is about 10274.3008034610. The cubic root of 105561257 is about 472.6084884747.

The spelling of 105561257 in words is "one hundred five million, five hundred sixty-one thousand, two hundred fifty-seven".