242129731 has 2 divisors, whose sum is σ = 242129732. Its totient is φ = 242129730.

The previous prime is 242129681. The next prime is 242129737. The reversal of 242129731 is 137921242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242129731 is a prime.

It is a super-2 number, since 2×242129731² = 117253613268264722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242129693 and 242129702.

It is not a weakly prime, because it can be changed into another prime (242129737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121064865 + 121064866.

It is an arithmetic number, because the mean of its divisors is an integer number (121064866).

Almost surely, 2^242129731 is an apocalyptic number.

242129731 is a deficient number, since it is larger than the sum of its proper divisors (1).

242129731 is an equidigital number, since it uses as much as digits as its factorization.

242129731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 242129731 is about 15560.5183396955. The cubic root of 242129731 is about 623.2793041969.

The spelling of 242129731 in words is "two hundred forty-two million, one hundred twenty-nine thousand, seven hundred thirty-one".