1051564121 has 4 divisors (see below), whose sum is σ = 1113420852. Its totient is φ = 989707392.

The previous prime is 1051564079. The next prime is 1051564123. The reversal of 1051564121 is 1214651501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1214651501 = 7 ⋅173521643.

It can be written as a sum of positive squares in 2 ways, for example, as 340808521 + 710755600 = 18461^2 + 26660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051564121 is a prime.

It is a super-2 number, since 2×1051564121² = 2211574201149005282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1051564123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30928340 + ... + 30928373.

It is an arithmetic number, because the mean of its divisors is an integer number (278355213).

Almost surely, 2^1051564121 is an apocalyptic number.

It is an amenable number.

1051564121 is a deficient number, since it is larger than the sum of its proper divisors (61856731).

1051564121 is an equidigital number, since it uses as much as digits as its factorization.

1051564121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61856730.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1051564121 is about 32427.8294216557. The cubic root of 1051564121 is about 1016.9007943214.

The spelling of 1051564121 in words is "one billion, fifty-one million, five hundred sixty-four thousand, one hundred twenty-one".