16401007 has 4 divisors (see below), whose sum is σ = 18744016. Its totient is φ = 14058000.

The previous prime is 16400987. The next prime is 16401013. The reversal of 16401007 is 70010461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70010461 = 131 ⋅534431.

It is a cyclic number.

It is not a de Polignac number, because 16401007 - 2¹¹ = 16398959 is a prime.

It is a super-2 number, since 2×16401007² = 537986061228098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401097) 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, 1171494 + ... + 1171507.

It is an arithmetic number, because the mean of its divisors is an integer number (4686004).

Almost surely, 2^16401007 is an apocalyptic number.

16401007 is a deficient number, since it is larger than the sum of its proper divisors (2343009).

16401007 is an equidigital number, since it uses as much as digits as its factorization.

16401007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343008.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 16401007 is about 4049.8156748178. The cubic root of 16401007 is about 254.0720185555.

Adding to 16401007 its reverse (70010461), we get a palindrome (86411468).

The spelling of 16401007 in words is "sixteen million, four hundred one thousand, seven".