1401139 has 2 divisors, whose sum is σ = 1401140. Its totient is φ = 1401138.

The previous prime is 1401131. The next prime is 1401151. The reversal of 1401139 is 9311041.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9311041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1401139 - 2³ = 1401131 is a prime.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (1401131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700569 + 700570.

It is an arithmetic number, because the mean of its divisors is an integer number (700570).

2^1401139 is an apocalyptic number.

1401139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401139 is an equidigital number, since it uses as much as digits as its factorization.

1401139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1401139 is about 1183.6971741117. The cubic root of 1401139 is about 111.8992237632.

It can be divided in two parts, 1401 and 139, that added together give a triangular number (1540 = T₅₅).

The spelling of 1401139 in words is "one million, four hundred one thousand, one hundred thirty-nine".