145857 has 4 divisors (see below), whose sum is σ = 194480. Its totient is φ = 97236.

The previous prime is 145829. The next prime is 145861. The reversal of 145857 is 758541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145857 - 2⁸ = 145601 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145857.

It is not an unprimeable number, because it can be changed into a prime (145807) 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, 24307 + ... + 24312.

It is an arithmetic number, because the mean of its divisors is an integer number (48620).

2¹⁴⁵⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

145857 is a deficient number, since it is larger than the sum of its proper divisors (48623).

145857 is an equidigital number, since it uses as much as digits as its factorization.

145857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48622.

The product of its digits is 5600, while the sum is 30.

The square root of 145857 is about 381.9122935963. The cubic root of 145857 is about 52.6391772013.

The spelling of 145857 in words is "one hundred forty-five thousand, eight hundred fifty-seven".