146615561 has 4 divisors (see below), whose sum is σ = 151671300. Its totient is φ = 141559824.

The previous prime is 146615519. The next prime is 146615563. The reversal of 146615561 is 165516641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102313225 + 44302336 = 10115^2 + 6656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146615561 is a prime.

It is a super-2 number, since 2×146615561² = 42992245454689442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146615563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2527826 + ... + 2527883.

It is an arithmetic number, because the mean of its divisors is an integer number (37917825).

Almost surely, 2^146615561 is an apocalyptic number.

It is an amenable number.

146615561 is a deficient number, since it is larger than the sum of its proper divisors (5055739).

146615561 is an equidigital number, since it uses as much as digits as its factorization.

146615561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055738.

The product of its digits is 21600, while the sum is 35.

The square root of 146615561 is about 12108.4912767859. The cubic root of 146615561 is about 527.3027328536.

The spelling of 146615561 in words is "one hundred forty-six million, six hundred fifteen thousand, five hundred sixty-one".