242137740 has 48 divisors (see below), whose sum is σ = 730140768. Its totient is φ = 59602944.

The previous prime is 242137699. The next prime is 242137741. The reversal of 242137740 is 47731242.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 242137698 and 242137707.

It is not an unprimeable number, because it can be changed into a prime (242137741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154437 + ... + 155996.

It is an arithmetic number, because the mean of its divisors is an integer number (15211266).

Almost surely, 2^242137740 is an apocalyptic number.

242137740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242137740 is an abundant number, since it is smaller than the sum of its proper divisors (488003028).

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

242137740 is a wasteful number, since it uses less digits than its factorization.

242137740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310458 (or 310456 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 242137740 is about 15560.7756876063. The cubic root of 242137740 is about 623.2861762553.

Adding to 242137740 its reverse (47731242), we get a palindrome (289868982).

The spelling of 242137740 in words is "two hundred forty-two million, one hundred thirty-seven thousand, seven hundred forty".