1406235139 has 4 divisors (see below), whose sum is σ = 1406625424. Its totient is φ = 1405844856.

The previous prime is 1406235119. The next prime is 1406235151. The reversal of 1406235139 is 9315326041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1406235139 - 2⁵ = 1406235107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406235119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189687 + ... + 196960.

It is an arithmetic number, because the mean of its divisors is an integer number (351656356).

Almost surely, 2^1406235139 is an apocalyptic number.

1406235139 is a deficient number, since it is larger than the sum of its proper divisors (390285).

1406235139 is an equidigital number, since it uses as much as digits as its factorization.

1406235139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390284.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1406235139 is about 37499.8018528098. The cubic root of 1406235139 is about 1120.3472400680.

The spelling of 1406235139 in words is "one billion, four hundred six million, two hundred thirty-five thousand, one hundred thirty-nine".