7121452561 has 8 divisors (see below), whose sum is σ = 7133736960. Its totient is φ = 7109181072.

The previous prime is 7121452501. The next prime is 7121452627. The reversal of 7121452561 is 1652541217.

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 7121452561 - 2¹¹ = 7121450513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121452501) 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, 1985776 + ... + 1989358.

It is an arithmetic number, because the mean of its divisors is an integer number (891717120).

Almost surely, 2^7121452561 is an apocalyptic number.

It is an amenable number.

7121452561 is a deficient number, since it is larger than the sum of its proper divisors (12284399).

7121452561 is a wasteful number, since it uses less digits than its factorization.

7121452561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455.

The product of its digits is 16800, while the sum is 34.

The square root of 7121452561 is about 84388.6992493663. The cubic root of 7121452561 is about 1923.9311600384.

Adding to 7121452561 its reverse (1652541217), we get a palindrome (8773993778).

The spelling of 7121452561 in words is "seven billion, one hundred twenty-one million, four hundred fifty-two thousand, five hundred sixty-one".