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BaseRepresentation
bin111100001011101001010
310201012010121
413201131022
51001101132
6110133454
722522252
oct7413512
93635117
101972042
111127696
127b128a
135407b7
14394962
1528e497
hex1e174a

1972042 has 8 divisors (see below), whose sum is σ = 2964132. Its totient is φ = 984000.

The previous prime is 1972037. The next prime is 1972049. The reversal of 1972042 is 2402791.

It can be written as a sum of positive squares in 2 ways, for example, as 1535121 + 436921 = 1239^2 + 661^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1971998 and 1972016.

It is not an unprimeable number, because it can be changed into a prime (1972049) 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, 1042 + ... + 2242.

21972042 is an apocalyptic number.

1972042 is a deficient number, since it is larger than the sum of its proper divisors (992090).

1972042 is a wasteful number, since it uses less digits than its factorization.

1972042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1972042 is about 1404.2941287351. The cubic root of 1972042 is about 125.4022667298.

The spelling of 1972042 in words is "one million, nine hundred seventy-two thousand, forty-two".

Divisors: 1 2 821 1201 1642 2402 986021 1972042