145424293 has 4 divisors (see below), whose sum is σ = 166199200. Its totient is φ = 124649388.

The previous prime is 145424263. The next prime is 145424327. The reversal of 145424293 is 392424541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 392424541 = 103 ⋅3809947.

It is a cyclic number.

It is not a de Polignac number, because 145424293 - 2¹⁷ = 145293221 is a prime.

It is a super-2 number, since 2×145424293² = 42296449989099698, which 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 (145424263) 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 3 ways as a sum of consecutive naturals, for example, 10387443 + ... + 10387456.

It is an arithmetic number, because the mean of its divisors is an integer number (41549800).

Almost surely, 2^145424293 is an apocalyptic number.

It is an amenable number.

145424293 is a deficient number, since it is larger than the sum of its proper divisors (20774907).

145424293 is an equidigital number, since it uses as much as digits as its factorization.

145424293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20774906.

The product of its digits is 34560, while the sum is 34.

The square root of 145424293 is about 12059.1995173809. The cubic root of 145424293 is about 525.8707159601.

The spelling of 145424293 in words is "one hundred forty-five million, four hundred twenty-four thousand, two hundred ninety-three".