242837621 has 6 divisors (see below), whose sum is σ = 262954530. Its totient is φ = 224157648.

The previous prime is 242837603. The next prime is 242837627. The reversal of 242837621 is 126738242.

It can be written as a sum of positive squares in 3 ways, for example, as 26894596 + 215943025 = 5186^2 + 14695^2 .

It is not a de Polignac number, because 242837621 - 2¹⁰ = 242836597 is a prime.

It is a super-2 number, since 2×242837621² = 117940220345879282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242837627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 718286 + ... + 718623.

It is an arithmetic number, because the mean of its divisors is an integer number (43825755).

Almost surely, 2^242837621 is an apocalyptic number.

It is an amenable number.

242837621 is a deficient number, since it is larger than the sum of its proper divisors (20116909).

242837621 is a wasteful number, since it uses less digits than its factorization.

242837621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436935 (or 1436922 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 242837621 is about 15583.2480888934. The cubic root of 242837621 is about 623.8861192642.

The spelling of 242837621 in words is "two hundred forty-two million, eight hundred thirty-seven thousand, six hundred twenty-one".