82421954 has 4 divisors (see below), whose sum is σ = 123632934. Its totient is φ = 41210976.

The previous prime is 82421951. The next prime is 82421957. The reversal of 82421954 is 45912428.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (82421951) and next prime (82421957).

It can be written as a sum of positive squares in only one way, i.e., 75255625 + 7166329 = 8675^2 + 2677^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82421951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20605487 + ... + 20605490.

Almost surely, 2^82421954 is an apocalyptic number.

82421954 is a deficient number, since it is larger than the sum of its proper divisors (41210980).

82421954 is a wasteful number, since it uses less digits than its factorization.

82421954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41210979.

The product of its digits is 23040, while the sum is 35.

The square root of 82421954 is about 9078.6537548251. The cubic root of 82421954 is about 435.1920656229.

The spelling of 82421954 in words is "eighty-two million, four hundred twenty-one thousand, nine hundred fifty-four".