101401640 has 16 divisors (see below), whose sum is σ = 228153780. Its totient is φ = 40560640.

The previous prime is 101401633. The next prime is 101401649. The reversal of 101401640 is 46104101.

It can be written as a sum of positive squares in 2 ways, for example, as 101324356 + 77284 = 10066^2 + 278^2 .

It is not an unprimeable number, because it can be changed into a prime (101401649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267481 + ... + 1267560.

Almost surely, 2^101401640 is an apocalyptic number.

101401640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101401640 is an abundant number, since it is smaller than the sum of its proper divisors (126752140).

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

101401640 is a wasteful number, since it uses less digits than its factorization.

101401640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535052 (or 2535048 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 101401640 is about 10069.8381317676. The cubic root of 101401640 is about 466.3174416743.

Adding to 101401640 its reverse (46104101), we get a palindrome (147505741).

The spelling of 101401640 in words is "one hundred one million, four hundred one thousand, six hundred forty".