210127138 has 8 divisors (see below), whose sum is σ = 339436188. Its totient is φ = 96981744.

The previous prime is 210127129. The next prime is 210127147. The reversal of 210127138 is 831721012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210127129) and next prime (210127147).

It can be written as a sum of positive squares in 2 ways, for example, as 210047049 + 80089 = 14493^2 + 283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040881 + ... + 4040932.

Almost surely, 2^210127138 is an apocalyptic number.

210127138 is a deficient number, since it is larger than the sum of its proper divisors (129309050).

210127138 is a wasteful number, since it uses less digits than its factorization.

210127138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081828.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 210127138 is about 14495.7627602000. The cubic root of 210127138 is about 594.5121231963.

The spelling of 210127138 in words is "two hundred ten million, one hundred twenty-seven thousand, one hundred thirty-eight".