1264021 has 8 divisors (see below), whose sum is σ = 1389888. Its totient is φ = 1140000.

The previous prime is 1264009. The next prime is 1264027. The reversal of 1264021 is 1204621.

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 1264021 - 2¹¹ = 1261973 is a prime.

It is a Duffinian number.

1264021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1263986 and 1264004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264027) 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, 1281 + ... + 2041.

It is an arithmetic number, because the mean of its divisors is an integer number (173736).

2^1264021 is an apocalyptic number.

1264021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1264021 is a deficient number, since it is larger than the sum of its proper divisors (125867).

1264021 is a wasteful number, since it uses less digits than its factorization.

1264021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1264021 is about 1124.2868850965. The cubic root of 1264021 is about 108.1230022908.

Adding to 1264021 its reverse (1204621), we get a palindrome (2468642).

The spelling of 1264021 in words is "one million, two hundred sixty-four thousand, twenty-one".