1555142040 has 96 divisors (see below), whose sum is σ = 5059080000. Its totient is φ = 414305280.

The previous prime is 1555142027. The next prime is 1555142041. The reversal of 1555142040 is 402415551.

1555142040 is a `hidden beast` number, since 155 + 51 + 420 + 40 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1555141995 and 1555142013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555142041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 718560 + ... + 720720.

It is an arithmetic number, because the mean of its divisors is an integer number (52698750).

Almost surely, 2^1555142040 is an apocalyptic number.

1555142040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555142040 is an abundant number, since it is smaller than the sum of its proper divisors (3503937960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1555142040 is a wasteful number, since it uses less digits than its factorization.

1555142040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177 (or 4170 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1555142040 is about 39435.2892724271. The cubic root of 1555142040 is about 1158.5728684043.

Adding to 1555142040 its reverse (402415551), we get a palindrome (1957557591).

The spelling of 1555142040 in words is "one billion, five hundred fifty-five million, one hundred forty-two thousand, forty".