145413523421 has 8 divisors (see below), whose sum is σ = 148817628960. Its totient is φ = 142010435952.

The previous prime is 145413523397. The next prime is 145413523429. The reversal of 145413523421 is 124325314541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145413523421 is a prime.

It is a super-2 number, since 2×145413523421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145413523429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38390 + ... + 540648.

It is an arithmetic number, because the mean of its divisors is an integer number (18602203620).

Almost surely, 2^145413523421 is an apocalyptic number.

It is an amenable number.

145413523421 is a deficient number, since it is larger than the sum of its proper divisors (3404105539).

145413523421 is an equidigital number, since it uses as much as digits as its factorization.

145413523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509035.

The product of its digits is 57600, while the sum is 35.

Adding to 145413523421 its reverse (124325314541), we get a palindrome (269738837962).

The spelling of 145413523421 in words is "one hundred forty-five billion, four hundred thirteen million, five hundred twenty-three thousand, four hundred twenty-one".