1427621 has 8 divisors (see below), whose sum is σ = 1548120. Its totient is φ = 1308672.

The previous prime is 1427617. The next prime is 1427627. The reversal of 1427621 is 1267241.

It can be written as a sum of positive squares in 4 ways, for example, as 21025 + 1406596 = 145^2 + 1186^2 .

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 1427621 - 2² = 1427617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427627) 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, 2225 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (193515).

2^1427621 is an apocalyptic number.

It is an amenable number.

1427621 is a deficient number, since it is larger than the sum of its proper divisors (120499).

1427621 is a wasteful number, since it uses less digits than its factorization.

1427621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its digits is 672, while the sum is 23.

The square root of 1427621 is about 1194.8309503859. The cubic root of 1427621 is about 112.5998060795.

It can be divided in two parts, 1427 and 621, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1427621 in words is "one million, four hundred twenty-seven thousand, six hundred twenty-one".