1002505155 has 16 divisors (see below), whose sum is σ = 1618726560. Its totient is φ = 529763328.

The previous prime is 1002505109. The next prime is 1002505169. The reversal of 1002505155 is 5515052001.

It is not a de Polignac number, because 1002505155 - 2¹⁶ = 1002439619 is a prime.

It is a super-3 number, since 3×1002505155³ (a number of 28 digits) contains 333 as substring.

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, 304942 + ... + 308211.

It is an arithmetic number, because the mean of its divisors is an integer number (101170410).

Almost surely, 2^1002505155 is an apocalyptic number.

1002505155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1002505155 is a deficient number, since it is larger than the sum of its proper divisors (616221405).

1002505155 is a wasteful number, since it uses less digits than its factorization.

1002505155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613270.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1002505155 is about 31662.3618038832. The cubic root of 1002505155 is about 1000.8343553242.

Adding to 1002505155 its reverse (5515052001), we get a palindrome (6517557156).

The spelling of 1002505155 in words is "one billion, two million, five hundred five thousand, one hundred fifty-five".