145468481 has 4 divisors (see below), whose sum is σ = 145493952. Its totient is φ = 145443012.

The previous prime is 145468471. The next prime is 145468483. The reversal of 145468481 is 184864541.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145468481 is a prime.

It is a super-2 number, since 2×145468481² = 42322157928894722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145468483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236 + ... + 17058.

It is an arithmetic number, because the mean of its divisors is an integer number (36373488).

Almost surely, 2^145468481 is an apocalyptic number.

It is an amenable number.

145468481 is a deficient number, since it is larger than the sum of its proper divisors (25471).

145468481 is an equidigital number, since it uses as much as digits as its factorization.

145468481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25470.

The product of its digits is 122880, while the sum is 41.

The square root of 145468481 is about 12061.0315064674. The cubic root of 145468481 is about 525.9239735040.

The spelling of 145468481 in words is "one hundred forty-five million, four hundred sixty-eight thousand, four hundred eighty-one".