1842134521 has 4 divisors (see below), whose sum is σ = 1873357200. Its totient is φ = 1810911844.

The previous prime is 1842134513. The next prime is 1842134597. The reversal of 1842134521 is 1254312481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1254312481 = 449 ⋅2793569.

It is a cyclic number.

It is not a de Polignac number, because 1842134521 - 2³ = 1842134513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1842134321) 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, 15611251 + ... + 15611368.

It is an arithmetic number, because the mean of its divisors is an integer number (468339300).

Almost surely, 2^1842134521 is an apocalyptic number.

It is an amenable number.

1842134521 is a deficient number, since it is larger than the sum of its proper divisors (31222679).

1842134521 is an equidigital number, since it uses as much as digits as its factorization.

1842134521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31222678.

The product of its digits is 7680, while the sum is 31.

The square root of 1842134521 is about 42920.0946061399. The cubic root of 1842134521 is about 1225.8587943806.

The spelling of 1842134521 in words is "one billion, eight hundred forty-two million, one hundred thirty-four thousand, five hundred twenty-one".