1051057261 has 8 divisors (see below), whose sum is σ = 1079893880. Its totient is φ = 1022243328.

The previous prime is 1051057253. The next prime is 1051057291. The reversal of 1051057261 is 1627501501.

It can be written as a sum of positive squares in 4 ways, for example, as 503778025 + 547279236 = 22445^2 + 23394^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1051057261 - 2³ = 1051057253 is a prime.

It is a super-2 number, since 2×1051057261² = 2209442731801644242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051057291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135685 + ... + 143221.

It is an arithmetic number, because the mean of its divisors is an integer number (134986735).

Almost surely, 2^1051057261 is an apocalyptic number.

It is an amenable number.

1051057261 is a deficient number, since it is larger than the sum of its proper divisors (28836619).

1051057261 is an equidigital number, since it uses as much as digits as its factorization.

1051057261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11343.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 1051057261 is about 32420.0132788375. The cubic root of 1051057261 is about 1016.7373840385.

Adding to 1051057261 its reverse (1627501501), we get a palindrome (2678558762).

The spelling of 1051057261 in words is "one billion, fifty-one million, fifty-seven thousand, two hundred sixty-one".