102001142 has 4 divisors (see below), whose sum is σ = 153001716. Its totient is φ = 51000570.

The previous prime is 102001127. The next prime is 102001157. The reversal of 102001142 is 241100201.

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

It is an interprime number because it is at equal distance from previous prime (102001127) and next prime (102001157).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500284 + ... + 25500287.

It is an arithmetic number, because the mean of its divisors is an integer number (38250429).

Almost surely, 2^102001142 is an apocalyptic number.

102001142 is a deficient number, since it is larger than the sum of its proper divisors (51000574).

102001142 is an equidigital number, since it uses as much as digits as its factorization.

102001142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51000573.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 102001142 is about 10099.5614756285. The cubic root of 102001142 is about 467.2346165543.

Adding to 102001142 its reverse (241100201), we get a palindrome (343101343).

The spelling of 102001142 in words is "one hundred two million, one thousand, one hundred forty-two".