34561021 has 4 divisors (see below), whose sum is σ = 37702944. Its totient is φ = 31419100.

The previous prime is 34560989. The next prime is 34561039. The reversal of 34561021 is 12016543.

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 34561021 - 2⁵ = 34560989 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34560983 and 34561001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34561091) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1570945 + ... + 1570966.

It is an arithmetic number, because the mean of its divisors is an integer number (9425736).

Almost surely, 2^34561021 is an apocalyptic number.

It is an amenable number.

34561021 is a deficient number, since it is larger than the sum of its proper divisors (3141923).

34561021 is a wasteful number, since it uses less digits than its factorization.

34561021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141922.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 34561021 is about 5878.8622198517. The cubic root of 34561021 is about 325.7333216223.

Adding to 34561021 its reverse (12016543), we get a palindrome (46577564).

The spelling of 34561021 in words is "thirty-four million, five hundred sixty-one thousand, twenty-one".