145601001 has 72 divisors (see below), whose sum is σ = 267026760. Its totient is φ = 75769344.

The previous prime is 145600979. The next prime is 145601021. The reversal of 145601001 is 100106541.

145601001 is a `hidden beast` number, since 1 + 4 + 560 + 100 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2822400 + 142778601 = 1680^2 + 11949^2 .

It is not a de Polignac number, because 145601001 - 2¹¹ = 145598953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145601021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 624781 + ... + 625013.

It is an arithmetic number, because the mean of its divisors is an integer number (3708705).

Almost surely, 2^145601001 is an apocalyptic number.

It is an amenable number.

145601001 is a deficient number, since it is larger than the sum of its proper divisors (121425759).

145601001 is a wasteful number, since it uses less digits than its factorization.

145601001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 145601001 is about 12066.5239816610. The cubic root of 145601001 is about 526.0836284599.

Adding to 145601001 its reverse (100106541), we get a palindrome (245707542).

The spelling of 145601001 in words is "one hundred forty-five million, six hundred one thousand, one".