10421505 has 12 divisors (see below), whose sum is σ = 18064020. Its totient is φ = 5558112.

The previous prime is 10421491. The next prime is 10421513. The reversal of 10421505 is 50512401.

It can be written as a sum of positive squares in 2 ways, for example, as 3873024 + 6548481 = 1968^2 + 2559^2 .

It is not a de Polignac number, because 10421505 - 2⁵ = 10421473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115750 + ... + 115839.

It is an arithmetic number, because the mean of its divisors is an integer number (1505335).

Almost surely, 2^10421505 is an apocalyptic number.

10421505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10421505 is a deficient number, since it is larger than the sum of its proper divisors (7642515).

10421505 is a wasteful number, since it uses less digits than its factorization.

10421505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231600 (or 231597 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 10421505 is about 3228.2355861988. The cubic root of 10421505 is about 218.4289243381.

Adding to 10421505 its reverse (50512401), we get a palindrome (60933906).

It can be divided in two parts, 104 and 21505, that added together give a square (21609 = 147²).

The spelling of 10421505 in words is "ten million, four hundred twenty-one thousand, five hundred five".