70312 has 32 divisors (see below), whose sum is σ = 155520. Its totient is φ = 29440.

The previous prime is 70309. The next prime is 70313. The reversal of 70312 is 21307.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 70292 and 70301.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70312.

It is not an unprimeable number, because it can be changed into a prime (70313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1473 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (4860).

2⁷⁰³¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77760).

70312 is an abundant number, since it is smaller than the sum of its proper divisors (85208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70312 is a wasteful number, since it uses less digits than its factorization.

70312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 70312 is about 265.1641001342. The cubic root of 70312 is about 41.2739927761.

Adding to 70312 its reverse (21307), we get a palindrome (91619).

The spelling of 70312 in words is "seventy thousand, three hundred twelve", and thus it is an iban number.