1401240439 has 2 divisors, whose sum is σ = 1401240440. Its totient is φ = 1401240438.

The previous prime is 1401240437. The next prime is 1401240493. The reversal of 1401240439 is 9340421041.

Together with next prime (1401240493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401240439 - 2¹ = 1401240437 is a prime.

Together with 1401240437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401240437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700620219 + 700620220.

It is an arithmetic number, because the mean of its divisors is an integer number (700620220).

Almost surely, 2^1401240439 is an apocalyptic number.

1401240439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401240439 is an equidigital number, since it uses as much as digits as its factorization.

1401240439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1401240439 is about 37433.1462610345. The cubic root of 1401240439 is about 1119.0192410713.

The spelling of 1401240439 in words is "one billion, four hundred one million, two hundred forty thousand, four hundred thirty-nine".