145612869 has 4 divisors (see below), whose sum is σ = 194150496. Its totient is φ = 97075244.

The previous prime is 145612867. The next prime is 145612927. The reversal of 145612869 is 968216541.

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: 968216541 = 3 ⋅322738847.

It is a cyclic number.

It is not a de Polignac number, because 145612869 - 2¹ = 145612867 is a prime.

It is a super-2 number, since 2×145612869² = 42406215236822322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145612869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145612867) 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, 24268809 + ... + 24268814.

It is an arithmetic number, because the mean of its divisors is an integer number (48537624).

Almost surely, 2^145612869 is an apocalyptic number.

It is an amenable number.

145612869 is a deficient number, since it is larger than the sum of its proper divisors (48537627).

145612869 is an equidigital number, since it uses as much as digits as its factorization.

145612869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48537626.

The product of its digits is 103680, while the sum is 42.

The square root of 145612869 is about 12067.0157454111. The cubic root of 145612869 is about 526.0979218389.

The spelling of 145612869 in words is "one hundred forty-five million, six hundred twelve thousand, eight hundred sixty-nine".