42140455 has 16 divisors (see below), whose sum is σ = 58775040. Its totient is φ = 28405152.

The previous prime is 42140443. The next prime is 42140477. The reversal of 42140455 is 55404124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42140455 - 2⁷ = 42140327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8139 + ... + 12268.

It is an arithmetic number, because the mean of its divisors is an integer number (3673440).

Almost surely, 2^42140455 is an apocalyptic number.

42140455 is a deficient number, since it is larger than the sum of its proper divisors (16634585).

42140455 is a wasteful number, since it uses less digits than its factorization.

42140455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20478.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42140455 is about 6491.5679924037. The cubic root of 42140455 is about 347.9897137709.

Adding to 42140455 its reverse (55404124), we get a palindrome (97544579).

The spelling of 42140455 in words is "forty-two million, one hundred forty thousand, four hundred fifty-five".