1555243004 has 24 divisors (see below), whose sum is σ = 3134237568. Its totient is φ = 661443120.

The previous prime is 1555242973. The next prime is 1555243013. The reversal of 1555243004 is 4003425551.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208334 + ... + 215669.

It is an arithmetic number, because the mean of its divisors is an integer number (130593232).

Almost surely, 2^1555243004 is an apocalyptic number.

1555243004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1555243004 is an abundant number, since it is smaller than the sum of its proper divisors (1578994564).

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

1555243004 is a wasteful number, since it uses less digits than its factorization.

1555243004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424145 (or 424143 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1555243004 is about 39436.5693741228. The cubic root of 1555243004 is about 1158.5979404164.

Adding to 1555243004 its reverse (4003425551), we get a palindrome (5558668555).

The spelling of 1555243004 in words is "one billion, five hundred fifty-five million, two hundred forty-three thousand, four".