1401621 has 16 divisors (see below), whose sum is σ = 2041536. Its totient is φ = 850176.

The previous prime is 1401613. The next prime is 1401623. The reversal of 1401621 is 1261041.

It is not a de Polignac number, because 1401621 - 2³ = 1401613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401623) 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, 3021 + ... + 3453.

It is an arithmetic number, because the mean of its divisors is an integer number (127596).

2^1401621 is an apocalyptic number.

It is an amenable number.

1401621 is a deficient number, since it is larger than the sum of its proper divisors (639915).

1401621 is a wasteful number, since it uses less digits than its factorization.

1401621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1401621 is about 1183.9007559758. The cubic root of 1401621 is about 111.9120536210.

Adding to 1401621 its reverse (1261041), we get a palindrome (2662662).

The spelling of 1401621 in words is "one million, four hundred one thousand, six hundred twenty-one".