145331005 has 8 divisors (see below), whose sum is σ = 179110872. Its totient is φ = 113122368.

The previous prime is 145330993. The next prime is 145331009. The reversal of 145331005 is 500133541.

It is a happy number.

145331005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 62047129 + 83283876 = 7877^2 + 9126^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145331005 - 2⁷ = 145330877 is a prime.

It is a super-2 number, since 2×145331005² = 42242202028620050, 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 (145331009) 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, 392602 + ... + 392971.

It is an arithmetic number, because the mean of its divisors is an integer number (22388859).

Almost surely, 2^145331005 is an apocalyptic number.

It is an amenable number.

145331005 is a deficient number, since it is larger than the sum of its proper divisors (33779867).

145331005 is an equidigital number, since it uses as much as digits as its factorization.

145331005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785615.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 145331005 is about 12055.3309784510. The cubic root of 145331005 is about 525.7582452488.

Adding to 145331005 its reverse (500133541), we get a palindrome (645464546).

The spelling of 145331005 in words is "one hundred forty-five million, three hundred thirty-one thousand, five".