102771142 has 4 divisors (see below), whose sum is σ = 154156716. Its totient is φ = 51385570.

The previous prime is 102771139. The next prime is 102771143. The reversal of 102771142 is 241177201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102771143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25692784 + ... + 25692787.

It is an arithmetic number, because the mean of its divisors is an integer number (38539179).

Almost surely, 2^102771142 is an apocalyptic number.

102771142 is a deficient number, since it is larger than the sum of its proper divisors (51385574).

102771142 is an equidigital number, since it uses as much as digits as its factorization.

102771142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51385573.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 102771142 is about 10137.6102706703. The cubic root of 102771142 is about 468.4073783825.

The spelling of 102771142 in words is "one hundred two million, seven hundred seventy-one thousand, one hundred forty-two".