16123401 has 32 divisors (see below), whose sum is σ = 27872000. Its totient is φ = 9208080.

The previous prime is 16123399. The next prime is 16123403. The reversal of 16123401 is 10432161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16123399) and next prime (16123403).

It is not a de Polignac number, because 16123401 - 2¹ = 16123399 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16123403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8391 + ... + 10131.

It is an arithmetic number, because the mean of its divisors is an integer number (871000).

Almost surely, 2^16123401 is an apocalyptic number.

It is an amenable number.

16123401 is a deficient number, since it is larger than the sum of its proper divisors (11748599).

16123401 is an equidigital number, since it uses as much as digits as its factorization.

16123401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16123401 is about 4015.3954973327. The cubic root of 16123401 is about 252.6303662976.

Adding to 16123401 its reverse (10432161), we get a palindrome (26555562).

The spelling of 16123401 in words is "sixteen million, one hundred twenty-three thousand, four hundred one".