1052621509 has 2 divisors, whose sum is σ = 1052621510. Its totient is φ = 1052621508.

The previous prime is 1052621503. The next prime is 1052621533. The reversal of 1052621509 is 9051262501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046716609 + 5904900 = 32353^2 + 2430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052621509 - 2³ = 1052621501 is a prime.

It is a super-2 number, since 2×1052621509² = 2216024082418874162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1052621501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526310754 + 526310755.

It is an arithmetic number, because the mean of its divisors is an integer number (526310755).

Almost surely, 2^1052621509 is an apocalyptic number.

It is an amenable number.

1052621509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1052621509 is an equidigital number, since it uses as much as digits as its factorization.

1052621509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1052621509 is about 32444.1290374699. The cubic root of 1052621509 is about 1017.2415243737.

The spelling of 1052621509 in words is "one billion, fifty-two million, six hundred twenty-one thousand, five hundred nine".