7860121 has 4 divisors (see below), whose sum is σ = 7886032. Its totient is φ = 7834212.

The previous prime is 7860109. The next prime is 7860133. The reversal of 7860121 is 1210687.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1210687 = 101 ⋅11987.

It is an interprime number because it is at equal distance from previous prime (7860109) and next prime (7860133).

It is a cyclic number.

It is not a de Polignac number, because 7860121 - 2¹¹ = 7858073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7860191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12495 + ... + 13108.

It is an arithmetic number, because the mean of its divisors is an integer number (1971508).

Almost surely, 2^7860121 is an apocalyptic number.

It is an amenable number.

7860121 is a deficient number, since it is larger than the sum of its proper divisors (25911).

7860121 is a wasteful number, since it uses less digits than its factorization.

7860121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25910.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 7860121 is about 2803.5907333275. The cubic root of 7860121 is about 198.8274810969.

The spelling of 7860121 in words is "seven million, eight hundred sixty thousand, one hundred twenty-one".