101855457 has 12 divisors (see below), whose sum is σ = 160499664. Its totient is φ = 61730520.

The previous prime is 101855441. The next prime is 101855461. The reversal of 101855457 is 754558101.

101855457 is a `hidden beast` number, since 101 + 8 + 5 + 545 + 7 = 666.

It is not a de Polignac number, because 101855457 - 2⁴ = 101855441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101855437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514323 + ... + 514520.

It is an arithmetic number, because the mean of its divisors is an integer number (13374972).

Almost surely, 2^101855457 is an apocalyptic number.

It is an amenable number.

101855457 is a deficient number, since it is larger than the sum of its proper divisors (58644207).

101855457 is a wasteful number, since it uses less digits than its factorization.

101855457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028860 (or 1028857 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 101855457 is about 10092.3464565977. The cubic root of 101855457 is about 467.0120650989.

It can be divided in two parts, 101 and 855457, that added together give a palindrome (855558).

The spelling of 101855457 in words is "one hundred one million, eight hundred fifty-five thousand, four hundred fifty-seven".