255640942 has 16 divisors (see below), whose sum is σ = 403304832. Its totient is φ = 121361760.

The previous prime is 255640927. The next prime is 255640949. The reversal of 255640942 is 249046552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255640949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35613 + ... + 42184.

It is an arithmetic number, because the mean of its divisors is an integer number (25206552).

Almost surely, 2^255640942 is an apocalyptic number.

255640942 is a deficient number, since it is larger than the sum of its proper divisors (147663890).

255640942 is a wasteful number, since it uses less digits than its factorization.

255640942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77883.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 255640942 is about 15988.7755003315. The cubic root of 255640942 is about 634.6634230119.

The spelling of 255640942 in words is "two hundred fifty-five million, six hundred forty thousand, nine hundred forty-two".