145279481 has 4 divisors (see below), whose sum is σ = 145307472. Its totient is φ = 145251492.

The previous prime is 145279457. The next prime is 145279483. The reversal of 145279481 is 184972541.

145279481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-145279481 is a prime.

It is a super-2 number, since 2×145279481² = 42212255199258722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145279483) 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, 3671 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (36326868).

Almost surely, 2^145279481 is an apocalyptic number.

It is an amenable number.

145279481 is a deficient number, since it is larger than the sum of its proper divisors (27991).

145279481 is an equidigital number, since it uses as much as digits as its factorization.

145279481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27990.

The product of its digits is 80640, while the sum is 41.

The square root of 145279481 is about 12053.1938091113. The cubic root of 145279481 is about 525.6961057905.

The spelling of 145279481 in words is "one hundred forty-five million, two hundred seventy-nine thousand, four hundred eighty-one".