145443457 has 4 divisors (see below), whose sum is σ = 145560240. Its totient is φ = 145326676.

The previous prime is 145443443. The next prime is 145443481. The reversal of 145443457 is 754344541.

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: 754344541 = 71 ⋅10624571.

It is a cyclic number.

It is not a de Polignac number, because 145443457 - 2¹⁵ = 145410689 is a prime.

It is a super-2 number, since 2×145443457² = 42307598368221698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145443257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56503 + ... + 59020.

It is an arithmetic number, because the mean of its divisors is an integer number (36390060).

Almost surely, 2^145443457 is an apocalyptic number.

It is an amenable number.

145443457 is a deficient number, since it is larger than the sum of its proper divisors (116783).

145443457 is a wasteful number, since it uses less digits than its factorization.

145443457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116782.

The product of its digits is 134400, while the sum is 37.

The square root of 145443457 is about 12059.9940713087. The cubic root of 145443457 is about 525.8938146770.

Adding to 145443457 its reverse (754344541), we get a palindrome (899787998).

The spelling of 145443457 in words is "one hundred forty-five million, four hundred forty-three thousand, four hundred fifty-seven".