1051121405 has 8 divisors (see below), whose sum is σ = 1261548600. Its totient is φ = 840761856.

The previous prime is 1051121399. The next prime is 1051121429. The reversal of 1051121405 is 5041211501.

It can be written as a sum of positive squares in 4 ways, for example, as 187525636 + 863595769 = 13694^2 + 29387^2 .

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 1051121405 - 2¹⁴ = 1051105021 is a prime.

It is a super-2 number, since 2×1051121405² = 2209712416098348050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28241 + ... + 53849.

It is an arithmetic number, because the mean of its divisors is an integer number (157693575).

Almost surely, 2^1051121405 is an apocalyptic number.

It is an amenable number.

1051121405 is a deficient number, since it is larger than the sum of its proper divisors (210427195).

1051121405 is an equidigital number, since it uses as much as digits as its factorization.

1051121405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33823.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1051121405 is about 32421.0025292248. The cubic root of 1051121405 is about 1016.7580667924.

Adding to 1051121405 its reverse (5041211501), we get a palindrome (6092332906).

The spelling of 1051121405 in words is "one billion, fifty-one million, one hundred twenty-one thousand, four hundred five".