1147420520 has 32 divisors (see below), whose sum is σ = 2584293120. Its totient is φ = 458506560.

The previous prime is 1147420511. The next prime is 1147420537. The reversal of 1147420520 is 250247411.

It is a self number, because there is not a number n which added to its sum of digits gives 1147420520.

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, 27329 + ... + 55151.

It is an arithmetic number, because the mean of its divisors is an integer number (80759160).

Almost surely, 2^1147420520 is an apocalyptic number.

1147420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1147420520 is an abundant number, since it is smaller than the sum of its proper divisors (1436872600).

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

1147420520 is a wasteful number, since it uses less digits than its factorization.

1147420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28865 (or 28861 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1147420520 is about 33873.5962070755. The cubic root of 1147420520 is about 1046.9056350967.

Adding to 1147420520 its reverse (250247411), we get a palindrome (1397667931).

The spelling of 1147420520 in words is "one billion, one hundred forty-seven million, four hundred twenty thousand, five hundred twenty".