34521020 has 48 divisors (see below), whose sum is σ = 76476960. Its totient is φ = 13069056.

The previous prime is 34521017. The next prime is 34521023. The reversal of 34521020 is 2012543.

It is an interprime number because it is at equal distance from previous prime (34521017) and next prime (34521023).

It is a self number, because there is not a number n which added to its sum of digits gives 34521020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34521023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30179 + ... + 31301.

It is an arithmetic number, because the mean of its divisors is an integer number (1593270).

Almost surely, 2^34521020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 34521020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38238480).

34521020 is an abundant number, since it is smaller than the sum of its proper divisors (41955940).

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

34521020 is a wasteful number, since it uses less digits than its factorization.

34521020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 34521020 is about 5875.4591309956. The cubic root of 34521020 is about 325.6076049593.

Adding to 34521020 its reverse (2012543), we get a palindrome (36533563).

The spelling of 34521020 in words is "thirty-four million, five hundred twenty-one thousand, twenty".