1401511 has 2 divisors, whose sum is σ = 1401512. Its totient is φ = 1401510.

The previous prime is 1401487. The next prime is 1401529. The reversal of 1401511 is 1151041.

It is a strong prime.

It is an emirp because it is prime and its reverse (1151041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1401511 - 2¹⁹ = 877223 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1401491 and 1401500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700755 + 700756.

It is an arithmetic number, because the mean of its divisors is an integer number (700756).

2^1401511 is an apocalyptic number.

1401511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401511 is an equidigital number, since it uses as much as digits as its factorization.

1401511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1401511 is about 1183.8542984675. The cubic root of 1401511 is about 111.9091259042.

Adding to 1401511 its reverse (1151041), we get a palindrome (2552552).

The spelling of 1401511 in words is "one million, four hundred one thousand, five hundred eleven".