10420505 has 4 divisors (see below), whose sum is σ = 12504612. Its totient is φ = 8336400.

The previous prime is 10420499. The next prime is 10420537. The reversal of 10420505 is 50502401.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6901129 + 3519376 = 2627^2 + 1876^2 .

It is not a de Polignac number, because 10420505 - 2⁶ = 10420441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042046 + ... + 1042055.

It is an arithmetic number, because the mean of its divisors is an integer number (3126153).

Almost surely, 2^10420505 is an apocalyptic number.

It is an amenable number.

10420505 is a deficient number, since it is larger than the sum of its proper divisors (2084107).

10420505 is an equidigital number, since it uses as much as digits as its factorization.

10420505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084106.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 10420505 is about 3228.0806991152. The cubic root of 10420505 is about 218.4219376341.

Adding to 10420505 its reverse (50502401), we get a palindrome (60922906).

The spelling of 10420505 in words is "ten million, four hundred twenty thousand, five hundred five".