34021561 has 8 divisors (see below), whose sum is σ = 39709440. Its totient is φ = 28540608.

The previous prime is 34021541. The next prime is 34021579. The reversal of 34021561 is 16512043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 34021561 - 2⁵ = 34021529 is a prime.

It is a super-2 number, since 2×34021561² = 2314933225753442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34021541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51376 + ... + 52033.

It is an arithmetic number, because the mean of its divisors is an integer number (4963680).

Almost surely, 2^34021561 is an apocalyptic number.

It is an amenable number.

34021561 is a deficient number, since it is larger than the sum of its proper divisors (5687879).

34021561 is a wasteful number, since it uses less digits than its factorization.

34021561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103463.

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

The square root of 34021561 is about 5832.8004423261. The cubic root of 34021561 is about 324.0296453340.

The spelling of 34021561 in words is "thirty-four million, twenty-one thousand, five hundred sixty-one".