1642261229 has 4 divisors (see below), whose sum is σ = 1876869984. Its totient is φ = 1407652476.

The previous prime is 1642261207. The next prime is 1642261241. The reversal of 1642261229 is 9221622461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1642261229 - 2²⁰ = 1641212653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642261129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117304367 + ... + 117304380.

It is an arithmetic number, because the mean of its divisors is an integer number (469217496).

Almost surely, 2^1642261229 is an apocalyptic number.

It is an amenable number.

1642261229 is a deficient number, since it is larger than the sum of its proper divisors (234608755).

1642261229 is an equidigital number, since it uses as much as digits as its factorization.

1642261229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234608754.

The product of its digits is 20736, while the sum is 35.

The square root of 1642261229 is about 40524.8223808569. The cubic root of 1642261229 is about 1179.8154525620.

The spelling of 1642261229 in words is "one billion, six hundred forty-two million, two hundred sixty-one thousand, two hundred twenty-nine".