70251505 has 4 divisors (see below), whose sum is σ = 84301812. Its totient is φ = 56201200.

The previous prime is 70251457. The next prime is 70251509. The reversal of 70251505 is 50515207.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50515207 = 79 ⋅639433.

It can be written as a sum of positive squares in 2 ways, for example, as 7033104 + 63218401 = 2652^2 + 7951^2 .

It is not a de Polignac number, because 70251505 - 2¹⁷ = 70120433 is a prime.

It is a super-5 number, since 5×70251505⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70251505.

It is not an unprimeable number, because it can be changed into a prime (70251509) 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, 7025146 + ... + 7025155.

It is an arithmetic number, because the mean of its divisors is an integer number (21075453).

Almost surely, 2^70251505 is an apocalyptic number.

It is an amenable number.

70251505 is a deficient number, since it is larger than the sum of its proper divisors (14050307).

70251505 is a wasteful number, since it uses less digits than its factorization.

70251505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14050306.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 70251505 is about 8381.6170874122. The cubic root of 70251505 is about 412.6215228122.

It can be divided in two parts, 70251 and 505, that added together give a square (70756 = 266²).

The spelling of 70251505 in words is "seventy million, two hundred fifty-one thousand, five hundred five".