1342809851 has 16 divisors (see below), whose sum is σ = 1428261120. Its totient is φ = 1259718240.

The previous prime is 1342809833. The next prime is 1342809869. The reversal of 1342809851 is 1589082431.

It is an interprime number because it is at equal distance from previous prime (1342809833) and next prime (1342809869).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1342809851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1342809799 and 1342809808.

It is not an unprimeable number, because it can be changed into a prime (1342809151) 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, 773981 + ... + 775713.

It is an arithmetic number, because the mean of its divisors is an integer number (89266320).

Almost surely, 2^1342809851 is an apocalyptic number.

1342809851 is a deficient number, since it is larger than the sum of its proper divisors (85451269).

1342809851 is a wasteful number, since it uses less digits than its factorization.

1342809851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1342809851 is about 36644.3699768464. The cubic root of 1342809851 is about 1103.2438272443.

The spelling of 1342809851 in words is "one billion, three hundred forty-two million, eight hundred nine thousand, eight hundred fifty-one".