981642 has 24 divisors (see below), whose sum is σ = 2039616. Its totient is φ = 314824.

The previous prime is 981637. The next prime is 981653. The reversal of 981642 is 246189.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16609 + ... + 16667.

It is an arithmetic number, because the mean of its divisors is an integer number (84984).

2⁹⁸¹⁶⁴² is an apocalyptic number.

981642 is an abundant number, since it is smaller than the sum of its proper divisors (1057974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981642 is a wasteful number, since it uses less digits than its factorization.

981642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 111 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 981642 is about 990.7784818011. The cubic root of 981642 is about 99.3842833778.

The spelling of 981642 in words is "nine hundred eighty-one thousand, six hundred forty-two".