145441350421 has 4 divisors (see below), whose sum is σ = 145853365932. Its totient is φ = 145029334912.

The previous prime is 145441350409. The next prime is 145441350443. The reversal of 145441350421 is 124053144541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24744863025 + 120696487396 = 157305^2 + 347414^2 .

It is a cyclic number.

It is not a de Polignac number, because 145441350421 - 2⁷ = 145441350293 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 (145441350121) 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, 206007226 + ... + 206007931.

It is an arithmetic number, because the mean of its divisors is an integer number (36463341483).

Almost surely, 2^145441350421 is an apocalyptic number.

It is an amenable number.

145441350421 is a deficient number, since it is larger than the sum of its proper divisors (412015511).

145441350421 is an equidigital number, since it uses as much as digits as its factorization.

145441350421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412015510.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 145441350421 its reverse (124053144541), we get a palindrome (269494494962).

The spelling of 145441350421 in words is "one hundred forty-five billion, four hundred forty-one million, three hundred fifty thousand, four hundred twenty-one".