1061511320 has 32 divisors (see below), whose sum is σ = 2446657920. Its totient is φ = 414247680.

The previous prime is 1061511317. The next prime is 1061511329. The reversal of 1061511320 is 231151601.

It is a super-2 number, since 2×1061511320² = 2253612564976284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1061511292 and 1061511301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061511329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321992 + ... + 325271.

It is an arithmetic number, because the mean of its divisors is an integer number (76458060).

Almost surely, 2^1061511320 is an apocalyptic number.

1061511320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061511320 is an abundant number, since it is smaller than the sum of its proper divisors (1385146600).

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

1061511320 is a wasteful number, since it uses less digits than its factorization.

1061511320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647315 (or 647311 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1061511320 is about 32580.8428374712. The cubic root of 1061511320 is about 1020.0971713142.

Adding to 1061511320 its reverse (231151601), we get a palindrome (1292662921).

The spelling of 1061511320 in words is "one billion, sixty-one million, five hundred eleven thousand, three hundred twenty".