1421616 has 40 divisors (see below), whose sum is σ = 4198144. Its totient is φ = 406080.

The previous prime is 1421611. The next prime is 1421621. The reversal of 1421616 is 6161241.

It is an interprime number because it is at equal distance from previous prime (1421611) and next prime (1421621).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1421592 and 1421601.

It is not an unprimeable number, because it can be changed into a prime (1421611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 2451.

2^1421616 is an apocalyptic number.

1421616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1421616 is an abundant number, since it is smaller than the sum of its proper divisors (2776528).

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

1421616 is a wasteful number, since it uses less digits than its factorization.

1421616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4243 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1421616 is about 1192.3153945161. The cubic root of 1421616 is about 112.4417080728.

Adding to 1421616 its reverse (6161241), we get a palindrome (7582857).

The spelling of 1421616 in words is "one million, four hundred twenty-one thousand, six hundred sixteen".