1061221507 has 8 divisors (see below), whose sum is σ = 1090985472. Its totient is φ = 1031757000.

The previous prime is 1061221471. The next prime is 1061221517. The reversal of 1061221507 is 7051221601.

1061221507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061221507 is a prime.

It is a super-2 number, since 2×1061221507² = 2252382173838702098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061221517) 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, 67669 + ... + 81862.

It is an arithmetic number, because the mean of its divisors is an integer number (136373184).

Almost surely, 2^1061221507 is an apocalyptic number.

1061221507 is a deficient number, since it is larger than the sum of its proper divisors (29763965).

1061221507 is a wasteful number, since it uses less digits than its factorization.

1061221507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149729.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1061221507 is about 32576.3949355972. The cubic root of 1061221507 is about 1020.0043274839.

The spelling of 1061221507 in words is "one billion, sixty-one million, two hundred twenty-one thousand, five hundred seven".