16121263 has 4 divisors (see below), whose sum is σ = 16385608. Its totient is φ = 15856920.

The previous prime is 16121257. The next prime is 16121269. The reversal of 16121263 is 36212161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16121257) and next prime (16121269).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16121263 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 (16121269) 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, 132081 + ... + 132202.

It is an arithmetic number, because the mean of its divisors is an integer number (4096402).

Almost surely, 2^16121263 is an apocalyptic number.

16121263 is a deficient number, since it is larger than the sum of its proper divisors (264345).

16121263 is an equidigital number, since it uses as much as digits as its factorization.

16121263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264344.

The product of its digits is 432, while the sum is 22.

The square root of 16121263 is about 4015.1292631745. The cubic root of 16121263 is about 252.6191993485.

It can be divided in two parts, 16121 and 263, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 16121263 in words is "sixteen million, one hundred twenty-one thousand, two hundred sixty-three".