7878253 has 4 divisors (see below), whose sum is σ = 7891840. Its totient is φ = 7864668.

The previous prime is 7878251. The next prime is 7878257. The reversal of 7878253 is 3528787.

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: 3528787 = 163 ⋅21649.

It is a cyclic number.

It is not a de Polignac number, because 7878253 - 2¹ = 7878251 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5883 + ... + 7096.

It is an arithmetic number, because the mean of its divisors is an integer number (1972960).

Almost surely, 2^7878253 is an apocalyptic number.

It is an amenable number.

7878253 is a deficient number, since it is larger than the sum of its proper divisors (13587).

7878253 is a wasteful number, since it uses less digits than its factorization.

7878253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13586.

The product of its digits is 94080, while the sum is 40.

The square root of 7878253 is about 2806.8225807842. The cubic root of 7878253 is about 198.9802510641.

It can be divided in two parts, 7 and 878253, that multiplied together give a triangular number (6147771 = T₃₅₀₆).

The spelling of 7878253 in words is "seven million, eight hundred seventy-eight thousand, two hundred fifty-three".