1285449538 has 8 divisors (see below), whose sum is σ = 1956953232. Its totient is φ = 633131796.

The previous prime is 1285449499. The next prime is 1285449619. The reversal of 1285449538 is 8359445821.

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

It is a junction number, because it is equal to n+sod(n) for n = 1285449491 and 1285449500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4796320 + ... + 4796587.

It is an arithmetic number, because the mean of its divisors is an integer number (244619154).

Almost surely, 2^1285449538 is an apocalyptic number.

1285449538 is a deficient number, since it is larger than the sum of its proper divisors (671503694).

1285449538 is an equidigital number, since it uses as much as digits as its factorization.

1285449538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592976.

The product of its digits is 1382400, while the sum is 49.

The square root of 1285449538 is about 35853.1663594724. The cubic root of 1285449538 is about 1087.3057319432.

The spelling of 1285449538 in words is "one billion, two hundred eighty-five million, four hundred forty-nine thousand, five hundred thirty-eight".