104771521 has 4 divisors (see below), whose sum is σ = 107208112. Its totient is φ = 102334932.

The previous prime is 104771503. The next prime is 104771539. The reversal of 104771521 is 125177401.

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: 125177401 = 37 ⋅3383173.

It is an interprime number because it is at equal distance from previous prime (104771503) and next prime (104771539).

It is a cyclic number.

It is not a de Polignac number, because 104771521 - 2⁵ = 104771489 is a prime.

It is a super-2 number, since 2×104771521² = 21954143225306882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104771521.

It is not an unprimeable number, because it can be changed into a prime (104771591) 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, 1218231 + ... + 1218316.

It is an arithmetic number, because the mean of its divisors is an integer number (26802028).

Almost surely, 2^104771521 is an apocalyptic number.

It is an amenable number.

104771521 is a deficient number, since it is larger than the sum of its proper divisors (2436591).

104771521 is an equidigital number, since it uses as much as digits as its factorization.

104771521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436590.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 104771521 is about 10235.7960608836. The cubic root of 104771521 is about 471.4269609591.

The spelling of 104771521 in words is "one hundred four million, seven hundred seventy-one thousand, five hundred twenty-one".