145821141 has 14 divisors (see below), whose sum is σ = 218632790. Its totient is φ = 97213608.

The previous prime is 145821131. The next prime is 145821161. The reversal of 145821141 is 141128541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 134792100 + 11029041 = 11610^2 + 3321^2 .

It is not a de Polignac number, because 145821141 - 2¹³ = 145812949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (145821101) 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 13 ways as a sum of consecutive naturals, for example, 99286 + ... + 100743.

Almost surely, 2^145821141 is an apocalyptic number.

It is an amenable number.

145821141 is a deficient number, since it is larger than the sum of its proper divisors (72811649).

145821141 is an frugal number, since it uses more digits than its factorization.

145821141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200047 (or 200032 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 145821141 is about 12075.6424673804. The cubic root of 145821141 is about 526.3486306032.

Adding to 145821141 its reverse (141128541), we get a palindrome (286949682).

The spelling of 145821141 in words is "one hundred forty-five million, eight hundred twenty-one thousand, one hundred forty-one".