242621145 has 24 divisors (see below), whose sum is σ = 452893896. Its totient is φ = 119443968.

The previous prime is 242621123. The next prime is 242621147. The reversal of 242621145 is 541126242.

242621145 is a `hidden beast` number, since 24 + 2 + 621 + 14 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 59397849 + 183223296 = 7707^2 + 13536^2 .

It is not a de Polignac number, because 242621145 - 2⁶ = 242621081 is a prime.

It is a super-2 number, since 2×242621145² = 117730040002222050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242621147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206784 + ... + 207953.

It is an arithmetic number, because the mean of its divisors is an integer number (18870579).

Almost surely, 2^242621145 is an apocalyptic number.

It is an amenable number.

242621145 is a deficient number, since it is larger than the sum of its proper divisors (210272751).

242621145 is a wasteful number, since it uses less digits than its factorization.

242621145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414761 (or 414758 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 242621145 is about 15576.3007482521. The cubic root of 242621145 is about 623.7006777572.

Adding to 242621145 its reverse (541126242), we get a palindrome (783747387).

The spelling of 242621145 in words is "two hundred forty-two million, six hundred twenty-one thousand, one hundred forty-five".