1421630 has 32 divisors (see below), whose sum is σ = 3055104. Its totient is φ = 465696.

The previous prime is 1421627. The next prime is 1421639. The reversal of 1421630 is 361241.

1421630 = T₄₄ + T₄₅ + ... + T₂₀₄.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1421599 and 1421608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1169 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (95472).

2^1421630 is an apocalyptic number.

1421630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421630 is an abundant number, since it is smaller than the sum of its proper divisors (1633474).

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

1421630 is a wasteful number, since it uses less digits than its factorization.

1421630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1421630 is about 1192.3212654314. The cubic root of 1421630 is about 112.4420771783.

Adding to 1421630 its reverse (361241), we get a palindrome (1782871).

The spelling of 1421630 in words is "one million, four hundred twenty-one thousand, six hundred thirty".