340042751 has 4 divisors (see below), whose sum is σ = 351011904. Its totient is φ = 329073600.

The previous prime is 340042727. The next prime is 340042771. The reversal of 340042751 is 157240043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157240043 = 41 ⋅3835123.

It is a cyclic number.

It is not a de Polignac number, because 340042751 - 2¹⁸ = 339780607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340042751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340042771) 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, 5484530 + ... + 5484591.

It is an arithmetic number, because the mean of its divisors is an integer number (87752976).

Almost surely, 2^340042751 is an apocalyptic number.

340042751 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

340042751 is a deficient number, since it is larger than the sum of its proper divisors (10969153).

340042751 is a wasteful number, since it uses less digits than its factorization.

340042751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10969152.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 340042751 is about 18440.2481273979. The cubic root of 340042751 is about 697.9824565997.

Adding to 340042751 its reverse (157240043), we get a palindrome (497282794).

The spelling of 340042751 in words is "three hundred forty million, forty-two thousand, seven hundred fifty-one".