145847561 has 8 divisors (see below), whose sum is σ = 148267584. Its totient is φ = 143437840.

The previous prime is 145847521. The next prime is 145847563. The reversal of 145847561 is 165748541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145847561 is a prime.

It is a super-2 number, since 2×145847561² = 42543022099297442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145847563) 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, 29135 + ... + 33771.

It is an arithmetic number, because the mean of its divisors is an integer number (18533448).

Almost surely, 2^145847561 is an apocalyptic number.

It is an amenable number.

145847561 is a deficient number, since it is larger than the sum of its proper divisors (2420023).

145847561 is an equidigital number, since it uses as much as digits as its factorization.

145847561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its digits is 134400, while the sum is 41.

The square root of 145847561 is about 12076.7363554894. The cubic root of 145847561 is about 526.3804167831.

The spelling of 145847561 in words is "one hundred forty-five million, eight hundred forty-seven thousand, five hundred sixty-one".