1642043051 has 4 divisors (see below), whose sum is σ = 1791319704. Its totient is φ = 1492766400.

The previous prime is 1642043003. The next prime is 1642043059. The reversal of 1642043051 is 1503402461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1503402461 = 11 ⋅136672951.

It is a cyclic number.

It is not a de Polignac number, because 1642043051 - 2¹⁴ = 1642026667 is a prime.

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 1642043051.

It is not an unprimeable number, because it can be changed into a prime (1642043059) 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, 74638310 + ... + 74638331.

It is an arithmetic number, because the mean of its divisors is an integer number (447829926).

Almost surely, 2^1642043051 is an apocalyptic number.

1642043051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1642043051 is a deficient number, since it is larger than the sum of its proper divisors (149276653).

1642043051 is a wasteful number, since it uses less digits than its factorization.

1642043051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149276652.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1642043051 is about 40522.1303857534. The cubic root of 1642043051 is about 1179.7632032261.

The spelling of 1642043051 in words is "one billion, six hundred forty-two million, forty-three thousand, fifty-one".