101640242 has 12 divisors (see below), whose sum is σ = 167580798. Its totient is φ = 46200000.

The previous prime is 101640193. The next prime is 101640251. The reversal of 101640242 is 242046101.

It can be written as a sum of positive squares in only one way, i.e., 77246521 + 24393721 = 8789^2 + 4939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209759 + ... + 210242.

Almost surely, 2^101640242 is an apocalyptic number.

101640242 is a deficient number, since it is larger than the sum of its proper divisors (65940556).

101640242 is a wasteful number, since it uses less digits than its factorization.

101640242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420025 (or 420014 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 101640242 is about 10081.6785308797. The cubic root of 101640242 is about 466.6829095253.

Adding to 101640242 its reverse (242046101), we get a palindrome (343686343).

The spelling of 101640242 in words is "one hundred one million, six hundred forty thousand, two hundred forty-two".