34745021 has 4 divisors (see below), whose sum is σ = 34757052. Its totient is φ = 34732992.

The previous prime is 34745003. The next prime is 34745023. The reversal of 34745021 is 12054743.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12054743 = 821 ⋅14683.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 19456921 = 3910^2 + 4411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34745021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34745023) 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, 1211 + ... + 8423.

It is an arithmetic number, because the mean of its divisors is an integer number (8689263).

Almost surely, 2^34745021 is an apocalyptic number.

It is an amenable number.

34745021 is a deficient number, since it is larger than the sum of its proper divisors (12031).

34745021 is an equidigital number, since it uses as much as digits as its factorization.

34745021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 34745021 is about 5894.4907328793. The cubic root of 34745021 is about 326.3103578331.

Adding to 34745021 its reverse (12054743), we get a palindrome (46799764).

The spelling of 34745021 in words is "thirty-four million, seven hundred forty-five thousand, twenty-one".