1011621 has 8 divisors (see below), whose sum is σ = 1452640. Its totient is φ = 622512.

The previous prime is 1011601. The next prime is 1011631. The reversal of 1011621 is 1261101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011621 - 2⁵ = 1011589 is a prime.

It is a Duffinian number.

1011621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1011597 and 1011606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011601) 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, 12931 + ... + 13008.

It is an arithmetic number, because the mean of its divisors is an integer number (181580).

2^1011621 is an apocalyptic number.

It is an amenable number.

1011621 is a deficient number, since it is larger than the sum of its proper divisors (441019).

1011621 is a wasteful number, since it uses less digits than its factorization.

1011621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25955.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1011621 is about 1005.7937164250. The cubic root of 1011621 is about 100.3858757505.

Adding to 1011621 its reverse (1261101), we get a palindrome (2272722).

The spelling of 1011621 in words is "one million, eleven thousand, six hundred twenty-one".