7870745 has 32 divisors (see below), whose sum is σ = 10782720. Its totient is φ = 5483520.

The previous prime is 7870739. The next prime is 7870817. The reversal of 7870745 is 5470787.

7870745 = 125² + 126² + ... + 294².

It is not a de Polignac number, because 7870745 - 2¹⁰ = 7869721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7870699 and 7870708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76364 + ... + 76466.

It is an arithmetic number, because the mean of its divisors is an integer number (336960).

Almost surely, 2^7870745 is an apocalyptic number.

It is an amenable number.

7870745 is a deficient number, since it is larger than the sum of its proper divisors (2911975).

7870745 is a wasteful number, since it uses less digits than its factorization.

7870745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 7870745 is about 2805.4848065887. The cubic root of 7870745 is about 198.9170213711.

The spelling of 7870745 in words is "seven million, eight hundred seventy thousand, seven hundred forty-five".