307242129 has 4 divisors (see below), whose sum is σ = 409656176. Its totient is φ = 204828084.

The previous prime is 307242127. The next prime is 307242157. The reversal of 307242129 is 921242703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921242703 = 3 ⋅307080901.

It is not a de Polignac number, because 307242129 - 2¹ = 307242127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 307242096 and 307242105.

It is not an unprimeable number, because it can be changed into a prime (307242127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51207019 + ... + 51207024.

It is an arithmetic number, because the mean of its divisors is an integer number (102414044).

Almost surely, 2^307242129 is an apocalyptic number.

It is an amenable number.

307242129 is a deficient number, since it is larger than the sum of its proper divisors (102414047).

307242129 is a wasteful number, since it uses less digits than its factorization.

307242129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102414046.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 307242129 is about 17528.3236220695. The cubic root of 307242129 is about 674.7769754277.

The spelling of 307242129 in words is "three hundred seven million, two hundred forty-two thousand, one hundred twenty-nine".