1687145112 has 56 divisors (see below), whose sum is σ = 4742942340. Its totient is φ = 562379760.

The previous prime is 1687145111. The next prime is 1687145113. The reversal of 1687145112 is 2115417861.

It is an interprime number because it is at equal distance from previous prime (1687145111) and next prime (1687145113).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687145111) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 138814 + ... + 150477.

Almost surely, 2^1687145112 is an apocalyptic number.

1687145112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1687145112 is an abundant number, since it is smaller than the sum of its proper divisors (3055797228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1687145112 is an equidigital number, since it uses as much as digits as its factorization.

1687145112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289315 (or 289296 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 1687145112 is about 41074.8720265809. The cubic root of 1687145112 is about 1190.4673239272.

The spelling of 1687145112 in words is "one billion, six hundred eighty-seven million, one hundred forty-five thousand, one hundred twelve".