145442101 has 4 divisors (see below), whose sum is σ = 166219552. Its totient is φ = 124664652.

The previous prime is 145442069. The next prime is 145442147. The reversal of 145442101 is 101244541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101244541 = 109 ⋅928849.

It is not a de Polignac number, because 145442101 - 2⁵ = 145442069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145445101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10388715 + ... + 10388728.

It is an arithmetic number, because the mean of its divisors is an integer number (41554888).

Almost surely, 2^145442101 is an apocalyptic number.

It is an amenable number.

145442101 is a deficient number, since it is larger than the sum of its proper divisors (20777451).

145442101 is an equidigital number, since it uses as much as digits as its factorization.

145442101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777450.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 145442101 is about 12059.9378522445. The cubic root of 145442101 is about 525.8921803323.

Adding to 145442101 its reverse (101244541), we get a palindrome (246686642).

The spelling of 145442101 in words is "one hundred forty-five million, four hundred forty-two thousand, one hundred one".