1634139 has 12 divisors (see below), whose sum is σ = 2542176. Its totient is φ = 1005552.

The previous prime is 1634117. The next prime is 1634141. The reversal of 1634139 is 9314361.

It is not a de Polignac number, because 1634139 - 2⁵ = 1634107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1634239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6867 + ... + 7100.

It is an arithmetic number, because the mean of its divisors is an integer number (211848).

2^1634139 is an apocalyptic number.

1634139 is a deficient number, since it is larger than the sum of its proper divisors (908037).

1634139 is a wasteful number, since it uses less digits than its factorization.

1634139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13986 (or 13983 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1634139 is about 1278.3344632763. The cubic root of 1634139 is about 117.7867209366.

The spelling of 1634139 in words is "one million, six hundred thirty-four thousand, one hundred thirty-nine".