1052639 has 4 divisors (see below), whose sum is σ = 1203024. Its totient is φ = 902256.

The previous prime is 1052629. The next prime is 1052663. The reversal of 1052639 is 9362501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1052639 is a prime.

It is a super-2 number, since 2×1052639² = 2216097728642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75182 + ... + 75195.

It is an arithmetic number, because the mean of its divisors is an integer number (300756).

2^1052639 is an apocalyptic number.

1052639 is a deficient number, since it is larger than the sum of its proper divisors (150385).

1052639 is an equidigital number, since it uses as much as digits as its factorization.

1052639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150384.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1052639 is about 1025.9819686525. The cubic root of 1052639 is about 101.7247158711.

It can be divided in two parts, 105 and 2639, that added together give a cube (2744 = 14³).

The spelling of 1052639 in words is "one million, fifty-two thousand, six hundred thirty-nine".