1001427 has 16 divisors (see below), whose sum is σ = 1562880. Its totient is φ = 558432.

The previous prime is 1001411. The next prime is 1001431. The reversal of 1001427 is 7241001.

It is not a de Polignac number, because 1001427 - 2⁴ = 1001411 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1001447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (97680).

2^1001427 is an apocalyptic number.

1001427 is a deficient number, since it is larger than the sum of its proper divisors (561453).

1001427 is a wasteful number, since it uses less digits than its factorization.

1001427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1001427 is about 1000.7132456403. The cubic root of 1001427 is about 100.0475440587.

Adding to 1001427 its reverse (7241001), we get a palindrome (8242428).

The spelling of 1001427 in words is "one million, one thousand, four hundred twenty-seven".