145224461 has 4 divisors (see below), whose sum is σ = 151538592. Its totient is φ = 138910332.

The previous prime is 145224439. The next prime is 145224463. The reversal of 145224461 is 164422541.

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 not a de Polignac number, because 145224461 - 2⁶ = 145224397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145224463) 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, 3157031 + ... + 3157076.

It is an arithmetic number, because the mean of its divisors is an integer number (37884648).

Almost surely, 2^145224461 is an apocalyptic number.

It is an amenable number.

145224461 is a deficient number, since it is larger than the sum of its proper divisors (6314131).

145224461 is an equidigital number, since it uses as much as digits as its factorization.

145224461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6314130.

The product of its digits is 7680, while the sum is 29.

The square root of 145224461 is about 12050.9112103608. The cubic root of 145224461 is about 525.6297338302.

The spelling of 145224461 in words is "one hundred forty-five million, two hundred twenty-four thousand, four hundred sixty-one".