1634642 has 4 divisors (see below), whose sum is σ = 2451966. Its totient is φ = 817320.

The previous prime is 1634609. The next prime is 1634657. The reversal of 1634642 is 2464361.

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

It can be written as a sum of positive squares in only one way, i.e., 1590121 + 44521 = 1261^2 + 211^2 .

It is a d-powerful number, because it can be written as 1 + 6⁵ + 3¹² + 4³ + 6⁶ + 4¹⁰ + 2⁷ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408659 + ... + 408662.

2^1634642 is an apocalyptic number.

1634642 is a deficient number, since it is larger than the sum of its proper divisors (817324).

1634642 is an equidigital number, since it uses as much as digits as its factorization.

1634642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817323.

The product of its digits is 3456, while the sum is 26.

The square root of 1634642 is about 1278.5311885128. The cubic root of 1634642 is about 117.7988049031.

The spelling of 1634642 in words is "one million, six hundred thirty-four thousand, six hundred forty-two".