1642589461 has 4 divisors (see below), whose sum is σ = 1642749952. Its totient is φ = 1642428972.

The previous prime is 1642589447. The next prime is 1642589471. The reversal of 1642589461 is 1649852461.

It is a happy number.

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 1642589461 - 2²¹ = 1640492309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642589471) 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, 63765 + ... + 85738.

It is an arithmetic number, because the mean of its divisors is an integer number (410687488).

Almost surely, 2^1642589461 is an apocalyptic number.

It is an amenable number.

1642589461 is a deficient number, since it is larger than the sum of its proper divisors (160491).

1642589461 is a wasteful number, since it uses less digits than its factorization.

1642589461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160490.

The product of its digits is 414720, while the sum is 46.

The square root of 1642589461 is about 40528.8719433443. The cubic root of 1642589461 is about 1179.8940489473.

The spelling of 1642589461 in words is "one billion, six hundred forty-two million, five hundred eighty-nine thousand, four hundred sixty-one".