145044869 has 4 divisors (see below), whose sum is σ = 146880960. Its totient is φ = 143208780.

The previous prime is 145044859. The next prime is 145044871. The reversal of 145044869 is 968440541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 968440541 = 41 ⋅23620501.

It is a cyclic number.

It is not a de Polignac number, because 145044869 - 2¹² = 145040773 is a prime.

It is a super-2 number, since 2×145044869² = 42076028046454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145044859) 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, 917927 + ... + 918084.

It is an arithmetic number, because the mean of its divisors is an integer number (36720240).

Almost surely, 2^145044869 is an apocalyptic number.

It is an amenable number.

145044869 is a deficient number, since it is larger than the sum of its proper divisors (1836091).

145044869 is an equidigital number, since it uses as much as digits as its factorization.

145044869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836090.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 145044869 is about 12043.4575185036. The cubic root of 145044869 is about 525.4129709100.

The spelling of 145044869 in words is "one hundred forty-five million, forty-four thousand, eight hundred sixty-nine".