70517250 has 128 divisors (see below), whose sum is σ = 202475520. Its totient is φ = 18144000.

The previous prime is 70517201. The next prime is 70517257. The reversal of 70517250 is 5271507.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (70517257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209082 + ... + 209418.

It is an arithmetic number, because the mean of its divisors is an integer number (1581840).

Almost surely, 2^70517250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70517250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101237760).

70517250 is an abundant number, since it is smaller than the sum of its proper divisors (131958270).

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

70517250 is a wasteful number, since it uses less digits than its factorization.

70517250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 70517250 is about 8397.4549715970. The cubic root of 70517250 is about 413.1411516974.

Adding to 70517250 its reverse (5271507), we get a palindrome (75788757).

It can be divided in two parts, 705 and 17250, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 70517250 in words is "seventy million, five hundred seventeen thousand, two hundred fifty".