145103563421 has 4 divisors (see below), whose sum is σ = 145104874332. Its totient is φ = 145102252512.

The previous prime is 145103563411. The next prime is 145103563433. The reversal of 145103563421 is 124365301541.

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 24634872025 + 120468691396 = 156955^2 + 347086^2 .

It is a cyclic number.

It is not a de Polignac number, because 145103563421 - 2⁶ = 145103563357 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 (145103563411) 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, 472376 + ... + 716481.

It is an arithmetic number, because the mean of its divisors is an integer number (36276218583).

Almost surely, 2^145103563421 is an apocalyptic number.

It is an amenable number.

145103563421 is a deficient number, since it is larger than the sum of its proper divisors (1310911).

145103563421 is a wasteful number, since it uses less digits than its factorization.

145103563421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310910.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 145103563421 its reverse (124365301541), we get a palindrome (269468864962).

The spelling of 145103563421 in words is "one hundred forty-five billion, one hundred three million, five hundred sixty-three thousand, four hundred twenty-one".