61451003 has 4 divisors (see below), whose sum is σ = 61772928. Its totient is φ = 61129080.

The previous prime is 61450981. The next prime is 61451011. The reversal of 61451003 is 30015416.

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 61451003 - 2²⁴ = 44673787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61451303) 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, 160676 + ... + 161057.

It is an arithmetic number, because the mean of its divisors is an integer number (15443232).

Almost surely, 2^61451003 is an apocalyptic number.

61451003 is a deficient number, since it is larger than the sum of its proper divisors (321925).

61451003 is a wasteful number, since it uses less digits than its factorization.

61451003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321924.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 61451003 is about 7839.0690136010. The cubic root of 61451003 is about 394.6174858093.

Adding to 61451003 its reverse (30015416), we get a palindrome (91466419).

The spelling of 61451003 in words is "sixty-one million, four hundred fifty-one thousand, three".