145811369 has 4 divisors (see below), whose sum is σ = 159066960. Its totient is φ = 132555780.

The previous prime is 145811359. The next prime is 145811381. The reversal of 145811369 is 963118541.

145811369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145811369 - 2¹⁶ = 145745833 is a prime.

It is a super-2 number, since 2×145811369² = 42521910659308322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145811359) 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, 6627779 + ... + 6627800.

It is an arithmetic number, because the mean of its divisors is an integer number (39766740).

Almost surely, 2^145811369 is an apocalyptic number.

It is an amenable number.

145811369 is a deficient number, since it is larger than the sum of its proper divisors (13255591).

145811369 is a wasteful number, since it uses less digits than its factorization.

145811369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13255590.

The product of its digits is 25920, while the sum is 38.

The square root of 145811369 is about 12075.2378444484. The cubic root of 145811369 is about 526.3368728345.

The spelling of 145811369 in words is "one hundred forty-five million, eight hundred eleven thousand, three hundred sixty-nine".