16261642 has 4 divisors (see below), whose sum is σ = 24392466. Its totient is φ = 8130820.

The previous prime is 16261633. The next prime is 16261649. The reversal of 16261642 is 24616261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24616261 = 1061 ⋅23201.

It can be written as a sum of positive squares in only one way, i.e., 14676561 + 1585081 = 3831^2 + 1259^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16261642.

It is not an unprimeable number, because it can be changed into a prime (16261649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065409 + ... + 4065412.

Almost surely, 2^16261642 is an apocalyptic number.

16261642 is a deficient number, since it is larger than the sum of its proper divisors (8130824).

16261642 is an equidigital number, since it uses as much as digits as its factorization.

16261642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130823.

The product of its digits is 3456, while the sum is 28.

The square root of 16261642 is about 4032.5726279882. The cubic root of 16261642 is about 253.3503247298.

The spelling of 16261642 in words is "sixteen million, two hundred sixty-one thousand, six hundred forty-two".