1515997120 has 112 divisors (see below), whose sum is σ = 3950208000. Its totient is φ = 549585920.

The previous prime is 1515997103. The next prime is 1515997129. The reversal of 1515997120 is 217995151.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1515997129) 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, 2108121 + ... + 2108839.

Almost surely, 2^1515997120 is an apocalyptic number.

1515997120 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 1515997120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975104000).

1515997120 is an abundant number, since it is smaller than the sum of its proper divisors (2434210880).

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

1515997120 is a wasteful number, since it uses less digits than its factorization.

1515997120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 40.

The square root of 1515997120 is about 38935.8076839302. The cubic root of 1515997120 is about 1148.7692238867.

The spelling of 1515997120 in words is "one billion, five hundred fifteen million, nine hundred ninety-seven thousand, one hundred twenty".