1285642351 has 6 divisors (see below), whose sum is σ = 1495543200. Its totient is φ = 1101979116.

The previous prime is 1285642349. The next prime is 1285642403. The reversal of 1285642351 is 1532465821.

It is not a de Polignac number, because 1285642351 - 2¹ = 1285642349 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 1285642351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285642321) 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, 13118751 + ... + 13118848.

It is an arithmetic number, because the mean of its divisors is an integer number (249257200).

Almost surely, 2^1285642351 is an apocalyptic number.

1285642351 is a deficient number, since it is larger than the sum of its proper divisors (209900849).

1285642351 is an equidigital number, since it uses as much as digits as its factorization.

1285642351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26237613 (or 26237606 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 1285642351 is about 35855.8551843350. The cubic root of 1285642351 is about 1087.3600932626.

The spelling of 1285642351 in words is "one billion, two hundred eighty-five million, six hundred forty-two thousand, three hundred fifty-one".