145869 has 4 divisors (see below), whose sum is σ = 194496. Its totient is φ = 97244.

The previous prime is 145861. The next prime is 145879. The reversal of 145869 is 968541.

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 a cyclic number.

It is not a de Polignac number, because 145869 - 2³ = 145861 is a prime.

It is a super-2 number, since 2×145869² = 42555530322, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145869.

It is not an unprimeable number, because it can be changed into a prime (145861) 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, 24309 + ... + 24314.

It is an arithmetic number, because the mean of its divisors is an integer number (48624).

2¹⁴⁵⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

145869 is a deficient number, since it is larger than the sum of its proper divisors (48627).

145869 is an equidigital number, since it uses as much as digits as its factorization.

145869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48626.

The product of its digits is 8640, while the sum is 33.

The square root of 145869 is about 381.9280036866. The cubic root of 145869 is about 52.6406207448.

The spelling of 145869 in words is "one hundred forty-five thousand, eight hundred sixty-nine".