145672505 has 36 divisors (see below), whose sum is σ = 198119460. Its totient is φ = 102738240.

The previous prime is 145672463. The next prime is 145672523. The reversal of 145672505 is 505276541.

145672505 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 2 ways, for example, as 77246521 + 68425984 = 8789^2 + 8272^2 .

It is not a de Polignac number, because 145672505 - 2¹⁸ = 145410361 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1336391 + ... + 1336499.

Almost surely, 2^145672505 is an apocalyptic number.

It is an amenable number.

145672505 is a deficient number, since it is larger than the sum of its proper divisors (52446955).

145672505 is a wasteful number, since it uses less digits than its factorization.

145672505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 145672505 is about 12069.4865259463. The cubic root of 145672505 is about 526.1697334714.

The spelling of 145672505 in words is "one hundred forty-five million, six hundred seventy-two thousand, five hundred five".