1002155401 has 16 divisors (see below), whose sum is σ = 1087611840. Its totient is φ = 917928000.

The previous prime is 1002155359. The next prime is 1002155419. The reversal of 1002155401 is 1045512001.

It is a cyclic number.

It is not a de Polignac number, because 1002155401 - 2⁹ = 1002154889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002155501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366831 + ... + 1367563.

It is an arithmetic number, because the mean of its divisors is an integer number (67975740).

Almost surely, 2^1002155401 is an apocalyptic number.

It is an amenable number.

1002155401 is a deficient number, since it is larger than the sum of its proper divisors (85456439).

1002155401 is a wasteful number, since it uses less digits than its factorization.

1002155401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1002155401 is about 31656.8381396500. The cubic root of 1002155401 is about 1000.7179514224.

Adding to 1002155401 its reverse (1045512001), we get a palindrome (2047667402).

The spelling of 1002155401 in words is "one billion, two million, one hundred fifty-five thousand, four hundred one".