61245240 has 64 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 13998720.

The previous prime is 61245221. The next prime is 61245241. The reversal of 61245240 is 4254216.

61245240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61245240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245241) 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 15 ways as a sum of consecutive naturals, for example, 35616 + ... + 37295.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^61245240 is an apocalyptic number.

61245240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61245240 is an abundant number, since it is smaller than the sum of its proper divisors (148741320).

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

61245240 is a wasteful number, since it uses less digits than its factorization.

61245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72932 (or 72928 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 61245240 is about 7825.9338100958. The cubic root of 61245240 is about 394.1765465766.

Adding to 61245240 its reverse (4254216), we get a palindrome (65499456).

The spelling of 61245240 in words is "sixty-one million, two hundred forty-five thousand, two hundred forty".