61512340 has 12 divisors (see below), whose sum is σ = 129175956. Its totient is φ = 24604928.

The previous prime is 61512337. The next prime is 61512359. The reversal of 61512340 is 4321516.

61512340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21215236 + 40297104 = 4606^2 + 6348^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1537789 + ... + 1537828.

It is an arithmetic number, because the mean of its divisors is an integer number (10764663).

Almost surely, 2^61512340 is an apocalyptic number.

It is an amenable number.

61512340 is an abundant number, since it is smaller than the sum of its proper divisors (67663616).

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

61512340 is a wasteful number, since it uses less digits than its factorization.

61512340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075626 (or 3075624 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 61512340 is about 7842.9803008805. The cubic root of 61512340 is about 394.7487372821.

Adding to 61512340 its reverse (4321516), we get a palindrome (65833856).

The spelling of 61512340 in words is "sixty-one million, five hundred twelve thousand, three hundred forty".