145041421 has 24 divisors (see below), whose sum is σ = 179837280. Its totient is φ = 116296992.

The previous prime is 145041419. The next prime is 145041503. The reversal of 145041421 is 124140541.

It is not a de Polignac number, because 145041421 - 2¹ = 145041419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145041392 and 145041401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145041401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76335 + ... + 78211.

It is an arithmetic number, because the mean of its divisors is an integer number (7493220).

Almost surely, 2^145041421 is an apocalyptic number.

It is an amenable number.

145041421 is a deficient number, since it is larger than the sum of its proper divisors (34795859).

145041421 is a wasteful number, since it uses less digits than its factorization.

145041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1986 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 145041421 is about 12043.3143693918. The cubic root of 145041421 is about 525.4088075127.

Adding to 145041421 its reverse (124140541), we get a palindrome (269181962).

The spelling of 145041421 in words is "one hundred forty-five million, forty-one thousand, four hundred twenty-one".