1781224485 has 8 divisors (see below), whose sum is σ = 2849959200. Its totient is φ = 949986384.

The previous prime is 1781224447. The next prime is 1781224519. The reversal of 1781224485 is 5844221871.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1781224485 - 2⁶ = 1781224421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59374135 + ... + 59374164.

It is an arithmetic number, because the mean of its divisors is an integer number (356244900).

Almost surely, 2^1781224485 is an apocalyptic number.

1781224485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1781224485 is a deficient number, since it is larger than the sum of its proper divisors (1068734715).

1781224485 is a wasteful number, since it uses less digits than its factorization.

1781224485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118748307.

The product of its digits is 143360, while the sum is 42.

The square root of 1781224485 is about 42204.5552636205. Note that the first 3 decimals coincide. The cubic root of 1781224485 is about 1212.1961084873.

The spelling of 1781224485 in words is "one billion, seven hundred eighty-one million, two hundred twenty-four thousand, four hundred eighty-five".