145020101 has 2 divisors, whose sum is σ = 145020102. Its totient is φ = 145020100.

The previous prime is 145020091. The next prime is 145020163. The reversal of 145020101 is 101020541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 70543201 = 8630^2 + 8399^2 .

It is an emirp because it is prime and its reverse (101020541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145020101 - 2¹⁴ = 145003717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145320101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72510050 + 72510051.

It is an arithmetic number, because the mean of its divisors is an integer number (72510051).

Almost surely, 2^145020101 is an apocalyptic number.

It is an amenable number.

145020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

145020101 is an equidigital number, since it uses as much as digits as its factorization.

145020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 145020101 is about 12042.4291984632. The cubic root of 145020101 is about 525.3830625344.

Adding to 145020101 its reverse (101020541), we get a palindrome (246040642).

The spelling of 145020101 in words is "one hundred forty-five million, twenty thousand, one hundred one".