145387441 has 4 divisors (see below), whose sum is σ = 146532352. Its totient is φ = 144242532.

The previous prime is 145387423. The next prime is 145387471. The reversal of 145387441 is 144783541.

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 145387441 - 2⁵ = 145387409 is a prime.

It is a super-2 number, since 2×145387441² = 42275016001056962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145387441.

It is not an unprimeable number, because it can be changed into a prime (145387471) 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, 572265 + ... + 572518.

It is an arithmetic number, because the mean of its divisors is an integer number (36633088).

Almost surely, 2^145387441 is an apocalyptic number.

It is an amenable number.

145387441 is a deficient number, since it is larger than the sum of its proper divisors (1144911).

145387441 is a wasteful number, since it uses less digits than its factorization.

145387441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144910.

The product of its digits is 53760, while the sum is 37.

The square root of 145387441 is about 12057.6714584533. The cubic root of 145387441 is about 525.8262918719.

The spelling of 145387441 in words is "one hundred forty-five million, three hundred eighty-seven thousand, four hundred forty-one".