145145501 has 4 divisors (see below), whose sum is σ = 145228512. Its totient is φ = 145062492.

The previous prime is 145145491. The next prime is 145145509. The reversal of 145145501 is 105541541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145145501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145145509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38825 + ... + 42398.

It is an arithmetic number, because the mean of its divisors is an integer number (36307128).

Almost surely, 2^145145501 is an apocalyptic number.

It is an amenable number.

145145501 is a deficient number, since it is larger than the sum of its proper divisors (83011).

145145501 is an equidigital number, since it uses as much as digits as its factorization.

145145501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83010.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 145145501 is about 12047.6346641156. The cubic root of 145145501 is about 525.5344531689.

The spelling of 145145501 in words is "one hundred forty-five million, one hundred forty-five thousand, five hundred one".