1161437020 has 12 divisors (see below), whose sum is σ = 2439017784. Its totient is φ = 464574800.

The previous prime is 1161436987. The next prime is 1161437023. The reversal of 1161437020 is 207341611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161437023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29035906 + ... + 29035945.

It is an arithmetic number, because the mean of its divisors is an integer number (203251482).

Almost surely, 2^1161437020 is an apocalyptic number.

1161437020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161437020 is an abundant number, since it is smaller than the sum of its proper divisors (1277580764).

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

1161437020 is a wasteful number, since it uses less digits than its factorization.

1161437020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58071860 (or 58071858 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1161437020 is about 34079.8623823513. The cubic root of 1161437020 is about 1051.1512753904.

Adding to 1161437020 its reverse (207341611), we get a palindrome (1368778631).

The spelling of 1161437020 in words is "one billion, one hundred sixty-one million, four hundred thirty-seven thousand, twenty".