145421243 has 8 divisors (see below), whose sum is σ = 162017280. Its totient is φ = 129387880.

The previous prime is 145421233. The next prime is 145421251. The reversal of 145421243 is 342124541.

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

It is a cyclic number.

It is not a de Polignac number, because 145421243 - 2⁸ = 145420987 is a prime.

It is a super-2 number, since 2×145421243² = 42294675831330098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145421233) 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 7 ways as a sum of consecutive naturals, for example, 140123 + ... + 141156.

It is an arithmetic number, because the mean of its divisors is an integer number (20252160).

Almost surely, 2^145421243 is an apocalyptic number.

145421243 is a deficient number, since it is larger than the sum of its proper divisors (16596037).

145421243 is a wasteful number, since it uses less digits than its factorization.

145421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281337.

The product of its digits is 3840, while the sum is 26.

The square root of 145421243 is about 12059.0730572461. The cubic root of 145421243 is about 525.8670395525.

Adding to 145421243 its reverse (342124541), we get a palindrome (487545784).

The spelling of 145421243 in words is "one hundred forty-five million, four hundred twenty-one thousand, two hundred forty-three".