1954565842 has 4 divisors (see below), whose sum is σ = 2931848766. Its totient is φ = 977282920.

The previous prime is 1954565831. The next prime is 1954565849. The reversal of 1954565842 is 2485654591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2485654591 = 7 ⋅355093513.

It can be written as a sum of positive squares in only one way, i.e., 1786837441 + 167728401 = 42271^2 + 12951^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1954565849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488641459 + ... + 488641462.

Almost surely, 2^1954565842 is an apocalyptic number.

1954565842 is a deficient number, since it is larger than the sum of its proper divisors (977282924).

1954565842 is an equidigital number, since it uses as much as digits as its factorization.

1954565842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977282923.

The product of its digits is 1728000, while the sum is 49.

The square root of 1954565842 is about 44210.4720852424. The cubic root of 1954565842 is about 1250.3073040718.

The spelling of 1954565842 in words is "one billion, nine hundred fifty-four million, five hundred sixty-five thousand, eight hundred forty-two".