1061231520 has 96 divisors (see below), whose sum is σ = 3354099840. Its totient is φ = 282045440.

The previous prime is 1061231519. The next prime is 1061231527. The reversal of 1061231520 is 251321601.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1061231520² = 2252424678083020800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061231527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145726 + ... + 152834.

It is an arithmetic number, because the mean of its divisors is an integer number (34938540).

Almost surely, 2^1061231520 is an apocalyptic number.

1061231520 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 1061231520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677049920).

1061231520 is an abundant number, since it is smaller than the sum of its proper divisors (2292868320).

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

1061231520 is a wasteful number, since it uses less digits than its factorization.

1061231520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438 (or 7430 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1061231520 is about 32576.5486201347. The cubic root of 1061231520 is about 1020.0075355076.

The spelling of 1061231520 in words is "one billion, sixty-one million, two hundred thirty-one thousand, five hundred twenty".