16461520 has 40 divisors (see below), whose sum is σ = 38557800. Its totient is φ = 6535680.

The previous prime is 16461503. The next prime is 16461539. The reversal of 16461520 is 2516461.

It can be written as a sum of positive squares in 4 ways, for example, as 107584 + 16353936 = 328^2 + 4044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11230 + ... + 12610.

It is an arithmetic number, because the mean of its divisors is an integer number (963945).

Almost surely, 2^16461520 is an apocalyptic number.

16461520 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 16461520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19278900).

16461520 is an abundant number, since it is smaller than the sum of its proper divisors (22096280).

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

16461520 is a wasteful number, since it uses less digits than its factorization.

16461520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 16461520 is about 4057.2798769619. The cubic root of 16461520 is about 254.3841089450.

Adding to 16461520 its reverse (2516461), we get a palindrome (18977981).

The spelling of 16461520 in words is "sixteen million, four hundred sixty-one thousand, five hundred twenty".