145855571 has 4 divisors (see below), whose sum is σ = 153532200. Its totient is φ = 138178944.

The previous prime is 145855553. The next prime is 145855639. The reversal of 145855571 is 175558541.

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

It is a de Polignac number, because none of the positive numbers 2^k-145855571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145855771) 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, 3838286 + ... + 3838323.

It is an arithmetic number, because the mean of its divisors is an integer number (38383050).

Almost surely, 2^145855571 is an apocalyptic number.

145855571 is a deficient number, since it is larger than the sum of its proper divisors (7676629).

145855571 is an equidigital number, since it uses as much as digits as its factorization.

145855571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676628.

The product of its digits is 140000, while the sum is 41.

The square root of 145855571 is about 12077.0679802674. The cubic root of 145855571 is about 526.3900529400.

It can be divided in two parts, 14 and 5855571, that added together give a palindrome (5855585).

The spelling of 145855571 in words is "one hundred forty-five million, eight hundred fifty-five thousand, five hundred seventy-one".