1401291 has 6 divisors (see below), whose sum is σ = 2024100. Its totient is φ = 934188.

The previous prime is 1401287. The next prime is 1401317. The reversal of 1401291 is 1921041.

It is not a de Polignac number, because 1401291 - 2² = 1401287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1401791) 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 in 5 ways as a sum of consecutive naturals, for example, 77841 + ... + 77858.

It is an arithmetic number, because the mean of its divisors is an integer number (337350).

2^1401291 is an apocalyptic number.

1401291 is a deficient number, since it is larger than the sum of its proper divisors (622809).

1401291 is a wasteful number, since it uses less digits than its factorization.

1401291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155705 (or 155702 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1401291 is about 1183.7613779812. The cubic root of 1401291 is about 111.9032700111.

It can be divided in two parts, 140 and 1291, that added together give a triangular number (1431 = T₅₃).

The spelling of 1401291 in words is "one million, four hundred one thousand, two hundred ninety-one".