145081857 has 8 divisors (see below), whose sum is σ = 194724160. Its totient is φ = 96080400.

The previous prime is 145081831. The next prime is 145081873. The reversal of 145081857 is 758180541.

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

It is not a de Polignac number, because 145081857 - 2¹² = 145077761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145088857) 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, 159682 + ... + 160587.

It is an arithmetic number, because the mean of its divisors is an integer number (24340520).

Almost surely, 2^145081857 is an apocalyptic number.

It is an amenable number.

145081857 is a deficient number, since it is larger than the sum of its proper divisors (49642303).

145081857 is a wasteful number, since it uses less digits than its factorization.

145081857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320423.

The product of its (nonzero) digits is 44800, while the sum is 39.

The square root of 145081857 is about 12044.9930261499. The cubic root of 145081857 is about 525.4576290984.

The spelling of 145081857 in words is "one hundred forty-five million, eighty-one thousand, eight hundred fifty-seven".