145405001 has 12 divisors (see below), whose sum is σ = 169399440. Its totient is φ = 124445160.

The previous prime is 145404989. The next prime is 145405003. The reversal of 145405001 is 100504541.

It is not a de Polignac number, because 145405001 - 2⁶ = 145404937 is a prime.

It is a super-2 number, since 2×145405001² = 42285228631620002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145405003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37910 + ... + 41568.

It is an arithmetic number, because the mean of its divisors is an integer number (14116620).

Almost surely, 2^145405001 is an apocalyptic number.

It is an amenable number.

145405001 is a deficient number, since it is larger than the sum of its proper divisors (23994439).

145405001 is an equidigital number, since it uses as much as digits as its factorization.

145405001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 145405001 is about 12058.3996035958. The cubic root of 145405001 is about 525.8474609126.

Adding to 145405001 its reverse (100504541), we get a palindrome (245909542).

The spelling of 145405001 in words is "one hundred forty-five million, four hundred five thousand, one".