1147261478 has 16 divisors (see below), whose sum is σ = 1887831360. Its totient is φ = 518567400.

The previous prime is 1147261421. The next prime is 1147261487. The reversal of 1147261478 is 8741627411.

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, 141728 + ... + 149603.

It is an arithmetic number, because the mean of its divisors is an integer number (117989460).

Almost surely, 2^1147261478 is an apocalyptic number.

1147261478 is a deficient number, since it is larger than the sum of its proper divisors (740569882).

1147261478 is a wasteful number, since it uses less digits than its factorization.

1147261478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291523.

The product of its digits is 75264, while the sum is 41.

The square root of 1147261478 is about 33871.2485450419. The cubic root of 1147261478 is about 1046.8572629272.

Adding to 1147261478 its reverse (8741627411), we get a palindrome (9888888889).

The spelling of 1147261478 in words is "one billion, one hundred forty-seven million, two hundred sixty-one thousand, four hundred seventy-eight".