1061672261 has 4 divisors (see below), whose sum is σ = 1143339372. Its totient is φ = 980005152.

The previous prime is 1061672251. The next prime is 1061672263. The reversal of 1061672261 is 1622761601.

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 448168900 + 613503361 = 21170^2 + 24769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061672261 - 2⁶ = 1061672197 is a prime.

It is a super-2 number, since 2×1061672261² = 2254295979553704242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061672263) 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, 40833536 + ... + 40833561.

It is an arithmetic number, because the mean of its divisors is an integer number (285834843).

Almost surely, 2^1061672261 is an apocalyptic number.

It is an amenable number.

1061672261 is a deficient number, since it is larger than the sum of its proper divisors (81667111).

1061672261 is an equidigital number, since it uses as much as digits as its factorization.

1061672261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81667110.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1061672261 is about 32583.3126155092. The cubic root of 1061672261 is about 1020.1487227074.

The spelling of 1061672261 in words is "one billion, sixty-one million, six hundred seventy-two thousand, two hundred sixty-one".