23121460 has 12 divisors (see below), whose sum is σ = 48555108. Its totient is φ = 9248576.

The previous prime is 23121457. The next prime is 23121473. The reversal of 23121460 is 6412132.

It can be written as a sum of positive squares in 2 ways, for example, as 16990884 + 6130576 = 4122^2 + 2476^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578017 + ... + 578056.

It is an arithmetic number, because the mean of its divisors is an integer number (4046259).

Almost surely, 2^23121460 is an apocalyptic number.

23121460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121460 is an abundant number, since it is smaller than the sum of its proper divisors (25433648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121460 is a wasteful number, since it uses less digits than its factorization.

23121460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156082 (or 1156080 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 23121460 is about 4808.4779296572. The cubic root of 23121460 is about 284.8864223744.

Adding to 23121460 its reverse (6412132), we get a palindrome (29533592).

The spelling of 23121460 in words is "twenty-three million, one hundred twenty-one thousand, four hundred sixty".