921618142 has 16 divisors (see below), whose sum is σ = 1518456960. Its totient is φ = 417574872.

The previous prime is 921618121. The next prime is 921618149. The reversal of 921618142 is 241816129.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 921618098 and 921618107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921618149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526368 + ... + 528115.

It is an arithmetic number, because the mean of its divisors is an integer number (94903560).

Almost surely, 2^921618142 is an apocalyptic number.

921618142 is a deficient number, since it is larger than the sum of its proper divisors (596838818).

921618142 is a wasteful number, since it uses less digits than its factorization.

921618142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054527.

The product of its digits is 6912, while the sum is 34.

The square root of 921618142 is about 30358.1643384444. The cubic root of 921618142 is about 973.1587048580.

The spelling of 921618142 in words is "nine hundred twenty-one million, six hundred eighteen thousand, one hundred forty-two".