1642222461 has 32 divisors (see below), whose sum is σ = 2465625600. Its totient is φ = 963737280.

The previous prime is 1642222451. The next prime is 1642222499.

1642222461 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1642222461 - 2⁵ = 1642222429 is a prime.

It is a super-2 number, since 2×1642222461² = 5393789222825793042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642222451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124155 + ... + 136743.

It is an arithmetic number, because the mean of its divisors is an integer number (77050800).

Almost surely, 2^1642222461 is an apocalyptic number.

1642222461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1642222461 is a deficient number, since it is larger than the sum of its proper divisors (823403139).

1642222461 is a wasteful number, since it uses less digits than its factorization.

1642222461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12729.

The product of its digits is 9216, while the sum is 30.

The square root of 1642222461 is about 40524.3440539141. The cubic root of 1642222461 is about 1179.8061687273.

It can be divided in two parts, 16422 and 22461, that added together give a palindrome (38883).

The spelling of 1642222461 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, four hundred sixty-one".