11420001 has 16 divisors (see below), whose sum is σ = 17001600. Its totient is φ = 7575984.

The previous prime is 11419999. The next prime is 11420009. The reversal of 11420001 is 10002411.

It is a happy number.

It is not a de Polignac number, because 11420001 - 2¹ = 11419999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11420009) 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, 5260 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (1062600).

Almost surely, 2^11420001 is an apocalyptic number.

It is an amenable number.

11420001 is a deficient number, since it is larger than the sum of its proper divisors (5581599).

11420001 is a wasteful number, since it uses less digits than its factorization.

11420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11420001 is about 3379.3491977006. The cubic root of 11420001 is about 225.1932561838.

Adding to 11420001 its reverse (10002411), we get a palindrome (21422412).

The spelling of 11420001 in words is "eleven million, four hundred twenty thousand, one".