145445861 has 8 divisors (see below), whose sum is σ = 159919104. Its totient is φ = 131181120.

The previous prime is 145445851. The next prime is 145445921. The reversal of 145445861 is 168544541.

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 145445861 - 2²² = 141251557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145445821) 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, 50660 + ... + 53453.

It is an arithmetic number, because the mean of its divisors is an integer number (19989888).

Almost surely, 2^145445861 is an apocalyptic number.

145445861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145445861 is a deficient number, since it is larger than the sum of its proper divisors (14473243).

145445861 is a wasteful number, since it uses less digits than its factorization.

145445861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104251.

The product of its digits is 76800, while the sum is 38.

The square root of 145445861 is about 12060.0937392709. The cubic root of 145445861 is about 525.8967121186.

The spelling of 145445861 in words is "one hundred forty-five million, four hundred forty-five thousand, eight hundred sixty-one".