61249930 has 32 divisors (see below), whose sum is σ = 128687616. Its totient is φ = 20552064.

The previous prime is 61249913. The next prime is 61249949. The reversal of 61249930 is 3994216.

61249930 = 389² + 390² + ... + 623².

61249930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 6019 + ... + 12598.

It is an arithmetic number, because the mean of its divisors is an integer number (4021488).

Almost surely, 2^61249930 is an apocalyptic number.

61249930 is an abundant number, since it is smaller than the sum of its proper divisors (67437686).

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

61249930 is a wasteful number, since it uses less digits than its factorization.

61249930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18678.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 61249930 is about 7826.2334491120. The cubic root of 61249930 is about 394.1866079888.

The spelling of 61249930 in words is "sixty-one million, two hundred forty-nine thousand, nine hundred thirty".