7121473261 has 6 divisors (see below), whose sum is σ = 8284162830. Its totient is φ = 6104119896.

The previous prime is 7121473259. The next prime is 7121473273. The reversal of 7121473261 is 1623741217.

It can be written as a sum of positive squares in only one way, i.e., 6745501161 + 375972100 = 82131^2 + 19390^2 .

It is not a de Polignac number, because 7121473261 - 2¹ = 7121473259 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 (7121473241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72668046 + ... + 72668143.

It is an arithmetic number, because the mean of its divisors is an integer number (1380693805).

Almost surely, 2^7121473261 is an apocalyptic number.

It is an amenable number.

7121473261 is a deficient number, since it is larger than the sum of its proper divisors (1162689569).

7121473261 is a wasteful number, since it uses less digits than its factorization.

7121473261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145336203 (or 145336196 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 7121473261 is about 84388.8218960308. The cubic root of 7121473261 is about 1923.9330241402.

The spelling of 7121473261 in words is "seven billion, one hundred twenty-one million, four hundred seventy-three thousand, two hundred sixty-one".