61320612 has 24 divisors (see below), whose sum is σ = 143208576. Its totient is φ = 20422048.

The previous prime is 61320607. The next prime is 61320617. The reversal of 61320612 is 21602316.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61320607) and next prime (61320617).

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (61320617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23518 + ... + 25994.

It is an arithmetic number, because the mean of its divisors is an integer number (5967024).

Almost surely, 2^61320612 is an apocalyptic number.

It is an amenable number.

61320612 is an abundant number, since it is smaller than the sum of its proper divisors (81887964).

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

61320612 is a wasteful number, since it uses less digits than its factorization.

61320612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4545 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 61320612 is about 7830.7478570057. The cubic root of 61320612 is about 394.3381792489.

Adding to 61320612 its reverse (21602316), we get a palindrome (82922928).

The spelling of 61320612 in words is "sixty-one million, three hundred twenty thousand, six hundred twelve".