24742621 has 2 divisors, whose sum is σ = 24742622. Its totient is φ = 24742620.

The previous prime is 24742589. The next prime is 24742649. The reversal of 24742621 is 12624742.

It is a happy number.

It is an a-pointer prime, because the next prime (24742649) can be obtained adding 24742621 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 1413721 = 4830^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 24742621 - 2⁵ = 24742589 is a prime.

It is a super-2 number, since 2×24742621² = 1224394587899282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 24742621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24742651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12371310 + 12371311.

It is an arithmetic number, because the mean of its divisors is an integer number (12371311).

Almost surely, 2^24742621 is an apocalyptic number.

It is an amenable number.

24742621 is a deficient number, since it is larger than the sum of its proper divisors (1).

24742621 is an equidigital number, since it uses as much as digits as its factorization.

24742621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 24742621 is about 4974.1955128443. The cubic root of 24742621 is about 291.3948694458.

The spelling of 24742621 in words is "twenty-four million, seven hundred forty-two thousand, six hundred twenty-one".