1421650 has 12 divisors (see below), whose sum is σ = 2644362. Its totient is φ = 568640.

The previous prime is 1421647. The next prime is 1421663. The reversal of 1421650 is 561241.

1421650 = T₁₅₆ + T₁₅₇ + ... + T₂₃₀.

It can be written as a sum of positive squares in 3 ways, for example, as 982081 + 439569 = 991^2 + 663^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14167 + ... + 14266.

2^1421650 is an apocalyptic number.

1421650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421650 is a deficient number, since it is larger than the sum of its proper divisors (1222712).

1421650 is a wasteful number, since it uses less digits than its factorization.

1421650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28445 (or 28440 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1421650 is about 1192.3296524032. The cubic root of 1421650 is about 112.4426044676.

Adding to 1421650 its reverse (561241), we get a palindrome (1982891).

The spelling of 1421650 in words is "one million, four hundred twenty-one thousand, six hundred fifty".