101261540 has 24 divisors (see below), whose sum is σ = 213276672. Its totient is φ = 40385120.

The previous prime is 101261491. The next prime is 101261543. The reversal of 101261540 is 45162101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (101261543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 14235.

It is an arithmetic number, because the mean of its divisors is an integer number (8886528).

Almost surely, 2^101261540 is an apocalyptic number.

101261540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101261540 is an abundant number, since it is smaller than the sum of its proper divisors (112015132).

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

101261540 is a wasteful number, since it uses less digits than its factorization.

101261540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14947 (or 14945 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 101261540 is about 10062.8793096211. The cubic root of 101261540 is about 466.1025826096.

The spelling of 101261540 in words is "one hundred one million, two hundred sixty-one thousand, five hundred forty".