1071947520 has 540 divisors, whose sum is σ = 4482994824. Its totient is φ = 243855360.

The previous prime is 1071947519. The next prime is 1071947531. The reversal of 1071947520 is 257491701.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (540).

It is a super-2 number, since 2×1071947520² = 2298142971268300800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5080215 + ... + 5080425.

Almost surely, 2^1071947520 is an apocalyptic number.

1071947520 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 1071947520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241497412).

1071947520 is an abundant number, since it is smaller than the sum of its proper divisors (3411047304).

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

1071947520 is an equidigital number, since it uses as much as digits as its factorization.

1071947520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1071947520 is about 32740.6096461260. The cubic root of 1071947520 is about 1023.4292881007.

The spelling of 1071947520 in words is "one billion, seventy-one million, nine hundred forty-seven thousand, five hundred twenty".