1154638 has 8 divisors (see below), whose sum is σ = 1742832. Its totient is φ = 573696.

The previous prime is 1154633. The next prime is 1154639. The reversal of 1154638 is 8364511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1154638² = 2666377822088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395 + ... + 2062.

It is an arithmetic number, because the mean of its divisors is an integer number (217854).

2^1154638 is an apocalyptic number.

1154638 is a deficient number, since it is larger than the sum of its proper divisors (588194).

1154638 is a wasteful number, since it uses less digits than its factorization.

1154638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626.

The product of its digits is 2880, while the sum is 28.

The square root of 1154638 is about 1074.5408321697. The cubic root of 1154638 is about 104.9096123117.

It can be divided in two parts, 115 and 4638, that added together give a triangular number (4753 = T₉₇).

The spelling of 1154638 in words is "one million, one hundred fifty-four thousand, six hundred thirty-eight".