842501901 has 4 divisors (see below), whose sum is σ = 1123335872. Its totient is φ = 561667932.

The previous prime is 842501879. The next prime is 842501917. The reversal of 842501901 is 109105248.

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 not a de Polignac number, because 842501901 - 2⁹ = 842501389 is a prime.

It is a super-2 number, since 2×842501901² = 1419618906377227602, 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 (842501921) 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, 140416981 + ... + 140416986.

It is an arithmetic number, because the mean of its divisors is an integer number (280833968).

Almost surely, 2^842501901 is an apocalyptic number.

It is an amenable number.

842501901 is a deficient number, since it is larger than the sum of its proper divisors (280833971).

842501901 is a wasteful number, since it uses less digits than its factorization.

842501901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280833970.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 842501901 is about 29025.8832940533. The cubic root of 842501901 is about 944.4746297306.

The spelling of 842501901 in words is "eight hundred forty-two million, five hundred one thousand, nine hundred one".