1687242075 has 12 divisors (see below), whose sum is σ = 2789573688. Its totient is φ = 899862400.

The previous prime is 1687242059. The next prime is 1687242079. The reversal of 1687242075 is 5702427861.

It is not a de Polignac number, because 1687242075 - 2⁴ = 1687242059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1687242079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11248206 + ... + 11248355.

It is an arithmetic number, because the mean of its divisors is an integer number (232464474).

Almost surely, 2^1687242075 is an apocalyptic number.

1687242075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1687242075 is a deficient number, since it is larger than the sum of its proper divisors (1102331613).

1687242075 is a wasteful number, since it uses less digits than its factorization.

1687242075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22496574 (or 22496569 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 1687242075 is about 41076.0523297943. The cubic root of 1687242075 is about 1190.4901295276.

The spelling of 1687242075 in words is "one billion, six hundred eighty-seven million, two hundred forty-two thousand, seventy-five".