1401921 has 16 divisors (see below), whose sum is σ = 2097600. Its totient is φ = 925344.

The previous prime is 1401857. The next prime is 1401937. The reversal of 1401921 is 1291041.

It is not a de Polignac number, because 1401921 - 2⁶ = 1401857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1401894 and 1401903.

It is not an unprimeable number, because it can be changed into a prime (1401971) 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, 3510 + ... + 3888.

It is an arithmetic number, because the mean of its divisors is an integer number (131100).

2^1401921 is an apocalyptic number.

It is an amenable number.

1401921 is a deficient number, since it is larger than the sum of its proper divisors (695679).

1401921 is a wasteful number, since it uses less digits than its factorization.

1401921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1401921 is about 1184.0274490061. The cubic root of 1401921 is about 111.9200375247.

Adding to 1401921 its reverse (1291041), we get a palindrome (2692962).

The spelling of 1401921 in words is "one million, four hundred one thousand, nine hundred twenty-one".