61321012 has 6 divisors (see below), whose sum is σ = 107311778. Its totient is φ = 30660504.

The previous prime is 61321009. The next prime is 61321021. The reversal of 61321012 is 21012316.

It can be written as a sum of positive squares in only one way, i.e., 42693156 + 18627856 = 6534^2 + 4316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7665123 + ... + 7665130.

Almost surely, 2^61321012 is an apocalyptic number.

It is an amenable number.

61321012 is a deficient number, since it is larger than the sum of its proper divisors (45990766).

61321012 is a wasteful number, since it uses less digits than its factorization.

61321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330257 (or 15330255 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 61321012 is about 7830.7733973089. The cubic root of 61321012 is about 394.3390366818.

Adding to 61321012 its reverse (21012316), we get a palindrome (82333328).

The spelling of 61321012 in words is "sixty-one million, three hundred twenty-one thousand, twelve".