1542828643 has 4 divisors (see below), whose sum is σ = 1542995440. Its totient is φ = 1542661848.

The previous prime is 1542828629. The next prime is 1542828649. The reversal of 1542828643 is 3468282451.

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: 3468282451 = 2531 ⋅1370321.

It is a cyclic number.

It is not a de Polignac number, because 1542828643 - 2⁵ = 1542828611 is a prime.

It is a super-2 number, since 2×1542828643² = 4760640443322442898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542828643.

It is not an unprimeable number, because it can be changed into a prime (1542828649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68655 + ... + 88312.

It is an arithmetic number, because the mean of its divisors is an integer number (385748860).

Almost surely, 2^1542828643 is an apocalyptic number.

1542828643 is a deficient number, since it is larger than the sum of its proper divisors (166797).

1542828643 is an equidigital number, since it uses as much as digits as its factorization.

1542828643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166796.

The product of its digits is 368640, while the sum is 43.

The square root of 1542828643 is about 39278.8574553792. The cubic root of 1542828643 is about 1155.5069563535.

The spelling of 1542828643 in words is "one billion, five hundred forty-two million, eight hundred twenty-eight thousand, six hundred forty-three".