1131015420 has 48 divisors (see below), whose sum is σ = 3518716320. Its totient is φ = 301603968.

The previous prime is 1131015401. The next prime is 1131015433. The reversal of 1131015420 is 245101311.

1131015420 is a `hidden beast` number, since 113 + 10 + 1 + 542 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1131015393 and 1131015402.

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, 1046697 + ... + 1047776.

It is an arithmetic number, because the mean of its divisors is an integer number (73306590).

Almost surely, 2^1131015420 is an apocalyptic number.

1131015420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131015420 is an abundant number, since it is smaller than the sum of its proper divisors (2387700900).

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

1131015420 is a wasteful number, since it uses less digits than its factorization.

1131015420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094491 (or 2094483 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1131015420 is about 33630.5726980675. The cubic root of 1131015420 is about 1041.8923325768.

Adding to 1131015420 its reverse (245101311), we get a palindrome (1376116731).

The spelling of 1131015420 in words is "one billion, one hundred thirty-one million, fifteen thousand, four hundred twenty".