1601406 has 24 divisors (see below), whose sum is σ = 3552120. Its totient is φ = 521136.

The previous prime is 1601399. The next prime is 1601423. The reversal of 1601406 is 6041061.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (148005).

2^1601406 is an apocalyptic number.

1601406 is an abundant number, since it is smaller than the sum of its proper divisors (1950714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601406 is a wasteful number, since it uses less digits than its factorization.

1601406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120 (or 2117 counting only the distinct ones).

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

The square root of 1601406 is about 1265.4667123240. The cubic root of 1601406 is about 116.9949592393.

Adding to 1601406 its reverse (6041061), we get a palindrome (7642467).

The spelling of 1601406 in words is "one million, six hundred one thousand, four hundred six".