2540139 has 32 divisors (see below), whose sum is σ = 4139520. Its totient is φ = 1354752.

The previous prime is 2540113. The next prime is 2540141. The reversal of 2540139 is 9310452.

2540139 = T₃₂₂ + T₃₂₃ + ... + T₃₆₄.

2540139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2540139 - 2⁷ = 2540011 is a prime.

It is a super-2 number, since 2×2540139² = 12904612278642, which contains 22 as substring.

2540139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2540179) 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 31 ways as a sum of consecutive naturals, for example, 26139 + ... + 26235.

It is an arithmetic number, because the mean of its divisors is an integer number (129360).

2^2540139 is an apocalyptic number.

2540139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2540139 is a deficient number, since it is larger than the sum of its proper divisors (1599381).

2540139 is a wasteful number, since it uses less digits than its factorization.

2540139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2540139 is about 1593.7813526328. The cubic root of 2540139 is about 136.4433878134.

The spelling of 2540139 in words is "two million, five hundred forty thousand, one hundred thirty-nine".