7820901 has 32 divisors (see below), whose sum is σ = 13392000. Its totient is φ = 4458240.

The previous prime is 7820887. The next prime is 7820927. The reversal of 7820901 is 1090287.

It is not a de Polignac number, because 7820901 - 2⁹ = 7820389 is a prime.

It is a super-2 number, since 2×7820901² = 122332984903602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4275 + ... + 5823.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

Almost surely, 2^7820901 is an apocalyptic number.

It is an amenable number.

7820901 is a deficient number, since it is larger than the sum of its proper divisors (5571099).

7820901 is a wasteful number, since it uses less digits than its factorization.

7820901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 7820901 is about 2796.5873846529. The cubic root of 7820901 is about 198.4962300506.

The spelling of 7820901 in words is "seven million, eight hundred twenty thousand, nine hundred one".