1400421 has 8 divisors (see below), whose sum is σ = 2037024. Its totient is φ = 848720.

The previous prime is 1400417. The next prime is 1400423. The reversal of 1400421 is 1240041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1400421 - 2² = 1400417 is a prime.

It is a super-2 number, since 2×1400421² = 3922357954482, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1400397 and 1400406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400423) 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, 21186 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (254628).

2^1400421 is an apocalyptic number.

1400421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1400421 is a deficient number, since it is larger than the sum of its proper divisors (636603).

1400421 is a wasteful number, since it uses less digits than its factorization.

1400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42451.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1400421 is about 1183.3938482179. The cubic root of 1400421 is about 111.8801066092.

Adding to 1400421 its reverse (1240041), we get a palindrome (2640462).

The spelling of 1400421 in words is "one million, four hundred thousand, four hundred twenty-one".