101002140 has 60 divisors (see below), whose sum is σ = 316852536. Its totient is φ = 26933472.

The previous prime is 101002129. The next prime is 101002169. The reversal of 101002140 is 41200101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29554 + ... + 32793.

Almost surely, 2^101002140 is an apocalyptic number.

101002140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101002140 is an abundant number, since it is smaller than the sum of its proper divisors (215850396).

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

101002140 is a wasteful number, since it uses less digits than its factorization.

101002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62368 (or 62357 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 101002140 is about 10049.9820895363. The cubic root of 101002140 is about 465.7042398662.

Adding to 101002140 its reverse (41200101), we get a palindrome (142202241).

The spelling of 101002140 in words is "one hundred one million, two thousand, one hundred forty".