145425112421 has 16 divisors (see below), whose sum is σ = 151304414400. Its totient is φ = 139605785088.

The previous prime is 145425112381. The next prime is 145425112439. The reversal of 145425112421 is 124211524541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145425112421 is a prime.

It is a super-2 number, since 2×145425112421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145425112621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3531770 + ... + 3572708.

It is an arithmetic number, because the mean of its divisors is an integer number (9456525900).

Almost surely, 2^145425112421 is an apocalyptic number.

It is an amenable number.

145425112421 is a deficient number, since it is larger than the sum of its proper divisors (5879301979).

145425112421 is a wasteful number, since it uses less digits than its factorization.

145425112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41668.

The product of its digits is 12800, while the sum is 32.

Adding to 145425112421 its reverse (124211524541), we get a palindrome (269636636962).

The spelling of 145425112421 in words is "one hundred forty-five billion, four hundred twenty-five million, one hundred twelve thousand, four hundred twenty-one".