1156601420 has 48 divisors (see below), whose sum is σ = 2641154880. Its totient is φ = 422896896.

The previous prime is 1156601417. The next prime is 1156601441. The reversal of 1156601420 is 241066511.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1156601420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5186 + ... + 48374.

It is an arithmetic number, because the mean of its divisors is an integer number (55024060).

Almost surely, 2^1156601420 is an apocalyptic number.

1156601420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156601420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320577440).

1156601420 is an abundant number, since it is smaller than the sum of its proper divisors (1484553460).

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

1156601420 is a wasteful number, since it uses less digits than its factorization.

1156601420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43314 (or 43312 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1156601420 is about 34008.8432617165. The cubic root of 1156601420 is about 1049.6904363314.

Adding to 1156601420 its reverse (241066511), we get a palindrome (1397667931).

The spelling of 1156601420 in words is "one billion, one hundred fifty-six million, six hundred one thousand, four hundred twenty".