1072320261 has 8 divisors (see below), whose sum is σ = 1430801184. Its totient is φ = 714359760.

The previous prime is 1072320241. The next prime is 1072320307. The reversal of 1072320261 is 1620232701.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1072320261 - 2⁵ = 1072320229 is a prime.

It is a super-2 number, since 2×1072320261² = 2299741484302216242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072320241) 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, 125271 + ... + 133556.

It is an arithmetic number, because the mean of its divisors is an integer number (178850148).

Almost surely, 2^1072320261 is an apocalyptic number.

It is an amenable number.

1072320261 is a deficient number, since it is larger than the sum of its proper divisors (358480923).

1072320261 is a wasteful number, since it uses less digits than its factorization.

1072320261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260211.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1072320261 is about 32746.3014858167. The cubic root of 1072320261 is about 1023.5478977160.

Adding to 1072320261 its reverse (1620232701), we get a palindrome (2692552962).

The spelling of 1072320261 in words is "one billion, seventy-two million, three hundred twenty thousand, two hundred sixty-one".