10690421 has 4 divisors (see below), whose sum is σ = 12217632. Its totient is φ = 9163212.

The previous prime is 10690411. The next prime is 10690441. The reversal of 10690421 is 12409601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10690421 - 2¹⁸ = 10428277 is a prime.

It is a super-2 number, since 2×10690421² = 228570202314482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10690411) 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, 763595 + ... + 763608.

It is an arithmetic number, because the mean of its divisors is an integer number (3054408).

Almost surely, 2^10690421 is an apocalyptic number.

It is an amenable number.

10690421 is a deficient number, since it is larger than the sum of its proper divisors (1527211).

10690421 is an equidigital number, since it uses as much as digits as its factorization.

10690421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527210.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10690421 is about 3269.6209260402. The cubic root of 10690421 is about 220.2917685269.

It can be divided in two parts, 10690 and 421, that added together give a palindrome (11111).

The spelling of 10690421 in words is "ten million, six hundred ninety thousand, four hundred twenty-one".