61509260 has 24 divisors (see below), whose sum is σ = 129439296. Its totient is φ = 24552320.

The previous prime is 61509257. The next prime is 61509263. The reversal of 61509260 is 6290516.

61509260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61509257) and next prime (61509263).

It is not an unprimeable number, because it can be changed into a prime (61509263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (5393304).

Almost surely, 2^61509260 is an apocalyptic number.

It is an amenable number.

61509260 is an abundant number, since it is smaller than the sum of its proper divisors (67930036).

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

61509260 is a wasteful number, since it uses less digits than its factorization.

61509260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433 (or 6431 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 61509260 is about 7842.7839444932. The cubic root of 61509260 is about 394.7421486507.

Adding to 61509260 its reverse (6290516), we get a palindrome (67799776).

It can be divided in two parts, 61509 and 260, that multiplied together give a triangular number (15992340 = T₅₆₅₅).

The spelling of 61509260 in words is "sixty-one million, five hundred nine thousand, two hundred sixty".