1555023042 has 32 divisors (see below), whose sum is σ = 3637483200. Its totient is φ = 491059584.

The previous prime is 1555023037. The next prime is 1555023049. The reversal of 1555023042 is 2403205551.

It is a happy number.

1555023042 is a `hidden beast` number, since 155 + 502 + 3 + 0 + 4 + 2 = 666.

It is a super-2 number, since 2×1555023042² = 4836193322301867528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1555022997 and 1555023015.

It is not an unprimeable number, because it can be changed into a prime (1555023049) 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, 756783 + ... + 758834.

It is an arithmetic number, because the mean of its divisors is an integer number (113671350).

Almost surely, 2^1555023042 is an apocalyptic number.

1555023042 is an abundant number, since it is smaller than the sum of its proper divisors (2082460158).

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

1555023042 is a wasteful number, since it uses less digits than its factorization.

1555023042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515647 (or 1515641 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1555023042 is about 39433.7804680201. The cubic root of 1555023042 is about 1158.5433166834.

Adding to 1555023042 its reverse (2403205551), we get a palindrome (3958228593).

The spelling of 1555023042 in words is "one billion, five hundred fifty-five million, twenty-three thousand, forty-two".