70732261 has 4 divisors (see below), whose sum is σ = 71141292. Its totient is φ = 70323232.

The previous prime is 70732253. The next prime is 70732267. The reversal of 70732261 is 16223707.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39929761 + 30802500 = 6319^2 + 5550^2 .

It is a cyclic number.

It is not a de Polignac number, because 70732261 - 2³ = 70732253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70732267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204256 + ... + 204601.

It is an arithmetic number, because the mean of its divisors is an integer number (17785323).

Almost surely, 2^70732261 is an apocalyptic number.

It is an amenable number.

70732261 is a deficient number, since it is larger than the sum of its proper divisors (409031).

70732261 is a wasteful number, since it uses less digits than its factorization.

70732261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409030.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 70732261 is about 8410.2473804282. The cubic root of 70732261 is about 413.5606224054.

Adding to 70732261 its reverse (16223707), we get a palindrome (86955968).

The spelling of 70732261 in words is "seventy million, seven hundred thirty-two thousand, two hundred sixty-one".