1247247144 has 96 divisors (see below), whose sum is σ = 3968546400. Its totient is φ = 348877440.

The previous prime is 1247247137. The next prime is 1247247161. The reversal of 1247247144 is 4417427421.

1247247144 is a `hidden beast` number, since 1 + 2 + 472 + 47 + 144 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1247247099 and 1247247108.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50274 + ... + 70865.

It is an arithmetic number, because the mean of its divisors is an integer number (41339025).

Almost surely, 2^1247247144 is an apocalyptic number.

It is an amenable number.

1247247144 is an abundant number, since it is smaller than the sum of its proper divisors (2721299256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247247144 is a wasteful number, since it uses less digits than its factorization.

1247247144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121175 (or 121168 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 1247247144 is about 35316.3863383557. The cubic root of 1247247144 is about 1076.4259840021.

It can be divided in two parts, 12472471 and 44, that added together give a triangular number (12472515 = T₄₉₉₄).

The spelling of 1247247144 in words is "one billion, two hundred forty-seven million, two hundred forty-seven thousand, one hundred forty-four".