145434632421 has 16 divisors (see below), whose sum is σ = 211345235136. Its totient is φ = 88419941376.

The previous prime is 145434632419. The next prime is 145434632423. The reversal of 145434632421 is 124236434541.

It is an interprime number because it is at equal distance from previous prime (145434632419) and next prime (145434632423).

It is not a de Polignac number, because 145434632421 - 2¹ = 145434632419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 145434632421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145434632423) 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, 22461180 + ... + 22467653.

It is an arithmetic number, because the mean of its divisors is an integer number (13209077196).

Almost surely, 2^145434632421 is an apocalyptic number.

It is an amenable number.

145434632421 is a deficient number, since it is larger than the sum of its proper divisors (65910602715).

145434632421 is a wasteful number, since it uses less digits than its factorization.

145434632421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44928932.

The product of its digits is 276480, while the sum is 39.

The spelling of 145434632421 in words is "one hundred forty-five billion, four hundred thirty-four million, six hundred thirty-two thousand, four hundred twenty-one".