101426781 has 4 divisors (see below), whose sum is σ = 135235712. Its totient is φ = 67617852.

The previous prime is 101426753. The next prime is 101426821. The reversal of 101426781 is 187624101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101426781 - 2⁵ = 101426749 is a prime.

It is a super-2 number, since 2×101426781² = 20574783808043922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101426701) 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, 16904461 + ... + 16904466.

It is an arithmetic number, because the mean of its divisors is an integer number (33808928).

Almost surely, 2^101426781 is an apocalyptic number.

It is an amenable number.

101426781 is a deficient number, since it is larger than the sum of its proper divisors (33808931).

101426781 is an equidigital number, since it uses as much as digits as its factorization.

101426781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33808930.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 101426781 is about 10071.0863862843. The cubic root of 101426781 is about 466.3559772707.

The spelling of 101426781 in words is "one hundred one million, four hundred twenty-six thousand, seven hundred eighty-one".