1051401521 has 4 divisors (see below), whose sum is σ = 1051507200. Its totient is φ = 1051295844.

The previous prime is 1051401511. The next prime is 1051401523. The reversal of 1051401521 is 1251041501.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1051401521 - 2⁶ = 1051401457 is a prime.

It is a super-2 number, since 2×1051401521² = 2210890316722226882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051401493 and 1051401502.

It is not an unprimeable number, because it can be changed into a prime (1051401523) 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, 36161 + ... + 58398.

It is an arithmetic number, because the mean of its divisors is an integer number (262876800).

Almost surely, 2^1051401521 is an apocalyptic number.

It is an amenable number.

1051401521 is a deficient number, since it is larger than the sum of its proper divisors (105679).

1051401521 is an equidigital number, since it uses as much as digits as its factorization.

1051401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105678.

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

The square root of 1051401521 is about 32425.3222189079. The cubic root of 1051401521 is about 1016.8483782462.

The spelling of 1051401521 in words is "one billion, fifty-one million, four hundred one thousand, five hundred twenty-one".