42081455 has 16 divisors (see below), whose sum is σ = 55308960. Its totient is φ = 30546048.

The previous prime is 42081451. The next prime is 42081461. The reversal of 42081455 is 55418024.

It is not a de Polignac number, because 42081455 - 2² = 42081451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42081451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1652 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (3456810).

Almost surely, 2^42081455 is an apocalyptic number.

42081455 is a deficient number, since it is larger than the sum of its proper divisors (13227505).

42081455 is a wasteful number, since it uses less digits than its factorization.

42081455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 42081455 is about 6487.0220440507. The cubic root of 42081455 is about 347.8272334620.

Adding to 42081455 its reverse (55418024), we get a palindrome (97499479).

The spelling of 42081455 in words is "forty-two million, eighty-one thousand, four hundred fifty-five".