1051005621 has 16 divisors (see below), whose sum is σ = 1419004800. Its totient is φ = 691894080.

The previous prime is 1051005611. The next prime is 1051005623. The reversal of 1051005621 is 1265001501.

It is not a de Polignac number, because 1051005621 - 2¹⁰ = 1051004597 is a prime.

It is a super-2 number, since 2×1051005621² = 2209225630747191282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051005623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70536 + ... + 84126.

It is an arithmetic number, because the mean of its divisors is an integer number (88687800).

Almost surely, 2^1051005621 is an apocalyptic number.

It is an amenable number.

1051005621 is a deficient number, since it is larger than the sum of its proper divisors (367999179).

1051005621 is a wasteful number, since it uses less digits than its factorization.

1051005621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13916.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1051005621 is about 32419.2168474194. The cubic root of 1051005621 is about 1016.7207324946.

The spelling of 1051005621 in words is "one billion, fifty-one million, five thousand, six hundred twenty-one".