70725261 has 4 divisors (see below), whose sum is σ = 94300352. Its totient is φ = 47150172.

The previous prime is 70725251. The next prime is 70725269. The reversal of 70725261 is 16252707.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70725261 - 2⁹ = 70724749 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 (70725269) 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, 11787541 + ... + 11787546.

It is an arithmetic number, because the mean of its divisors is an integer number (23575088).

Almost surely, 2^70725261 is an apocalyptic number.

It is an amenable number.

70725261 is a deficient number, since it is larger than the sum of its proper divisors (23575091).

70725261 is a wasteful number, since it uses less digits than its factorization.

70725261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23575090.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 70725261 is about 8409.8312111481. The cubic root of 70725261 is about 413.5469793152.

Adding to 70725261 its reverse (16252707), we get a palindrome (86977968).

The spelling of 70725261 in words is "seventy million, seven hundred twenty-five thousand, two hundred sixty-one".