1401791 has 2 divisors, whose sum is σ = 1401792. Its totient is φ = 1401790.

The previous prime is 1401767. The next prime is 1401793. The reversal of 1401791 is 1971041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401791 is a prime.

Together with 1401793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700895 + 700896.

It is an arithmetic number, because the mean of its divisors is an integer number (700896).

2^1401791 is an apocalyptic number.

1401791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401791 is an equidigital number, since it uses as much as digits as its factorization.

1401791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1401791 is about 1183.9725503575. The cubic root of 1401791 is about 111.9165779729.

The spelling of 1401791 in words is "one million, four hundred one thousand, seven hundred ninety-one".