1061611521 has 8 divisors (see below), whose sum is σ = 1428711264. Its totient is φ = 701126400.

The previous prime is 1061611451. The next prime is 1061611531. The reversal of 1061611521 is 1251161601.

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

It is not a de Polignac number, because 1061611521 - 2¹³ = 1061603329 is a prime.

It is a super-2 number, since 2×1061611521² = 2254038043039866882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1061611491 and 1061611500.

It is not an unprimeable number, because it can be changed into a prime (1061611531) 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, 1653280 + ... + 1653921.

It is an arithmetic number, because the mean of its divisors is an integer number (178588908).

Almost surely, 2^1061611521 is an apocalyptic number.

It is an amenable number.

1061611521 is a deficient number, since it is larger than the sum of its proper divisors (367099743).

1061611521 is a wasteful number, since it uses less digits than its factorization.

1061611521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307311.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1061611521 is about 32582.3805299736. The cubic root of 1061611521 is about 1020.1292675461.

The spelling of 1061611521 in words is "one billion, sixty-one million, six hundred eleven thousand, five hundred twenty-one".