145765491 has 8 divisors (see below), whose sum is σ = 194819520. Its totient is φ = 96944232.

The previous prime is 145765483. The next prime is 145765541. The reversal of 145765491 is 194567541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145765491 - 2³ = 145765483 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (145765091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56725 + ... + 59238.

It is an arithmetic number, because the mean of its divisors is an integer number (24352440).

Almost surely, 2^145765491 is an apocalyptic number.

145765491 is a deficient number, since it is larger than the sum of its proper divisors (49054029).

145765491 is a wasteful number, since it uses less digits than its factorization.

145765491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116385.

The product of its digits is 151200, while the sum is 42.

The square root of 145765491 is about 12073.3380222704. The cubic root of 145765491 is about 526.2816649400.

The spelling of 145765491 in words is "one hundred forty-five million, seven hundred sixty-five thousand, four hundred ninety-one".