61420503 has 4 divisors (see below), whose sum is σ = 81894008. Its totient is φ = 40947000.

The previous prime is 61420477. The next prime is 61420543. The reversal of 61420503 is 30502416.

It is a happy number.

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

It is not a de Polignac number, because 61420503 - 2¹³ = 61412311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61420503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10236748 + ... + 10236753.

It is an arithmetic number, because the mean of its divisors is an integer number (20473502).

Almost surely, 2^61420503 is an apocalyptic number.

61420503 is a deficient number, since it is larger than the sum of its proper divisors (20473505).

61420503 is a wasteful number, since it uses less digits than its factorization.

61420503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20473504.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 61420503 is about 7837.1233880806. The cubic root of 61420503 is about 394.5521881221.

Adding to 61420503 its reverse (30502416), we get a palindrome (91922919).

The spelling of 61420503 in words is "sixty-one million, four hundred twenty thousand, five hundred three".