24142621 has 4 divisors (see below), whose sum is σ = 24391612. Its totient is φ = 23893632.

The previous prime is 24142609. The next prime is 24142639. The reversal of 24142621 is 12624142.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12624142 = 2 ⋅6312071.

It can be written as a sum of positive squares in 2 ways, for example, as 7901721 + 16240900 = 2811^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 24142621 - 2⁵ = 24142589 is a prime.

It is a super-2 number, since 2×24142621² = 1165732297499282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24142592 and 24142601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24142661) 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, 124350 + ... + 124543.

It is an arithmetic number, because the mean of its divisors is an integer number (6097903).

Almost surely, 2^24142621 is an apocalyptic number.

It is an amenable number.

24142621 is a deficient number, since it is larger than the sum of its proper divisors (248991).

24142621 is an equidigital number, since it uses as much as digits as its factorization.

24142621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248990.

The product of its digits is 768, while the sum is 22.

The square root of 24142621 is about 4913.5141192430. The cubic root of 24142621 is about 289.0201611873.

Adding to 24142621 its reverse (12624142), we get a palindrome (36766763).

The spelling of 24142621 in words is "twenty-four million, one hundred forty-two thousand, six hundred twenty-one".