1161335420 has 48 divisors (see below), whose sum is σ = 2790402048. Its totient is φ = 397715520.

The previous prime is 1161335407. The next prime is 1161335431. The reversal of 1161335420 is 245331611.

It is a self number, because there is not a number n which added to its sum of digits gives 1161335420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131669 + ... + 140211.

It is an arithmetic number, because the mean of its divisors is an integer number (58133376).

Almost surely, 2^1161335420 is an apocalyptic number.

1161335420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161335420 is an abundant number, since it is smaller than the sum of its proper divisors (1629066628).

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

1161335420 is a wasteful number, since it uses less digits than its factorization.

1161335420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530 (or 9528 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1161335420 is about 34078.3717334030. The cubic root of 1161335420 is about 1051.1206236828.

The spelling of 1161335420 in words is "one billion, one hundred sixty-one million, three hundred thirty-five thousand, four hundred twenty".