152740242 has 30 divisors (see below), whose sum is σ = 342604119. Its totient is φ = 50860980.

The previous prime is 152740229. The next prime is 152740243. The reversal of 152740242 is 242047251.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 76370121 = 8739^2 + 8739^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8739.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (152740243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 156817 + ... + 157787.

Almost surely, 2^152740242 is an apocalyptic number.

152740242 is an abundant number, since it is smaller than the sum of its proper divisors (189863877).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

152740242 is an frugal number, since it uses more digits than its factorization.

152740242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 152740242 is about 12358.8123215785. The cubic root of 152740242 is about 534.5452705785.

Adding to 152740242 its reverse (242047251), we get a palindrome (394787493).

The spelling of 152740242 in words is "one hundred fifty-two million, seven hundred forty thousand, two hundred forty-two".