61445103 has 4 divisors (see below), whose sum is σ = 81926808. Its totient is φ = 40963400.

The previous prime is 61445077. The next prime is 61445143. The reversal of 61445103 is 30154416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61445103 - 2⁶ = 61445039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61445143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10240848 + ... + 10240853.

It is an arithmetic number, because the mean of its divisors is an integer number (20481702).

Almost surely, 2^61445103 is an apocalyptic number.

61445103 is a deficient number, since it is larger than the sum of its proper divisors (20481705).

61445103 is a wasteful number, since it uses less digits than its factorization.

61445103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20481704.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61445103 is about 7838.6926843703. The cubic root of 61445103 is about 394.6048561392.

Adding to 61445103 its reverse (30154416), we get a palindrome (91599519).

The spelling of 61445103 in words is "sixty-one million, four hundred forty-five thousand, one hundred three".