1247150505 has 32 divisors (see below), whose sum is σ = 2133008640. Its totient is φ = 620702720.

The previous prime is 1247150497. The next prime is 1247150533. The reversal of 1247150505 is 5050517421.

It is not a de Polignac number, because 1247150505 - 2³ = 1247150497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29940 + ... + 58229.

It is an arithmetic number, because the mean of its divisors is an integer number (66656520).

Almost surely, 2^1247150505 is an apocalyptic number.

1247150505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1247150505 is a deficient number, since it is larger than the sum of its proper divisors (885858135).

1247150505 is a wasteful number, since it uses less digits than its factorization.

1247150505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88241.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1247150505 is about 35315.0181226061. The cubic root of 1247150505 is about 1076.3981821298.

Adding to 1247150505 its reverse (5050517421), we get a palindrome (6297667926).

The spelling of 1247150505 in words is "one billion, two hundred forty-seven million, one hundred fifty thousand, five hundred five".