249342129 has 6 divisors (see below), whose sum is σ = 360160866. Its totient is φ = 166228080.

The previous prime is 249342109. The next prime is 249342139. The reversal of 249342129 is 921243942.

249342129 is a `hidden beast` number, since 2 + 493 + 42 + 129 = 666.

It can be written as a sum of positive squares in only one way, i.e., 205979904 + 43362225 = 14352^2 + 6585^2 .

It is not a de Polignac number, because 249342129 - 2¹¹ = 249340081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249342093 and 249342102.

It is not an unprimeable number, because it can be changed into a prime (249342109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13852332 + ... + 13852349.

It is an arithmetic number, because the mean of its divisors is an integer number (60026811).

Almost surely, 2^249342129 is an apocalyptic number.

It is an amenable number.

249342129 is a deficient number, since it is larger than the sum of its proper divisors (110818737).

249342129 is a wasteful number, since it uses less digits than its factorization.

249342129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27704687 (or 27704684 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 249342129 is about 15790.5708889831. The cubic root of 249342129 is about 629.4074625244.

It can be divided in two parts, 249 and 342129, that added together give a triangular number (342378 = T₈₂₇).

The spelling of 249342129 in words is "two hundred forty-nine million, three hundred forty-two thousand, one hundred twenty-nine".