1041661261 has 4 divisors (see below), whose sum is σ = 1057208512. Its totient is φ = 1026114012.

The previous prime is 1041661253. The next prime is 1041661267. The reversal of 1041661261 is 1621661401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1041661261 - 2³ = 1041661253 is a prime.

It is a super-2 number, since 2×1041661261² = 2170116365336220242, 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 (1041661267) 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, 7773525 + ... + 7773658.

It is an arithmetic number, because the mean of its divisors is an integer number (264302128).

Almost surely, 2^1041661261 is an apocalyptic number.

It is an amenable number.

1041661261 is a deficient number, since it is larger than the sum of its proper divisors (15547251).

1041661261 is an equidigital number, since it uses as much as digits as its factorization.

1041661261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15547250.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1041661261 is about 32274.7774740586. Note that the first 3 decimals coincide. The cubic root of 1041661261 is about 1013.6985790802.

The spelling of 1041661261 in words is "one billion, forty-one million, six hundred sixty-one thousand, two hundred sixty-one".