152721242 has 12 divisors (see below), whose sum is σ = 239476650. Its totient is φ = 73040088.

The previous prime is 152721229. The next prime is 152721281. The reversal of 152721242 is 242127251.

152721242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 125462401 + 27258841 = 11201^2 + 5221^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71117 + ... + 73232.

Almost surely, 2^152721242 is an apocalyptic number.

152721242 is a deficient number, since it is larger than the sum of its proper divisors (86755408).

152721242 is a wasteful number, since it uses less digits than its factorization.

152721242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144397 (or 144374 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 152721242 is about 12358.0436153948. The cubic root of 152721242 is about 534.5231048825.

Adding to 152721242 its reverse (242127251), we get a palindrome (394848493).

The spelling of 152721242 in words is "one hundred fifty-two million, seven hundred twenty-one thousand, two hundred forty-two".