857148901 has 4 divisors (see below), whose sum is σ = 979598752. Its totient is φ = 734699052.

The previous prime is 857148871. The next prime is 857148931. The reversal of 857148901 is 109841758.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (857148871) and next prime (857148931).

It is a cyclic number.

It is not a de Polignac number, because 857148901 - 2⁵ = 857148869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857148931) 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, 61224915 + ... + 61224928.

It is an arithmetic number, because the mean of its divisors is an integer number (244899688).

Almost surely, 2^857148901 is an apocalyptic number.

It is an amenable number.

857148901 is a deficient number, since it is larger than the sum of its proper divisors (122449851).

857148901 is a wasteful number, since it uses less digits than its factorization.

857148901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122449850.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 857148901 is about 29277.1054067850. The cubic root of 857148901 is about 949.9164842557.

The spelling of 857148901 in words is "eight hundred fifty-seven million, one hundred forty-eight thousand, nine hundred one".