1002121455 has 16 divisors (see below), whose sum is σ = 1604173824. Its totient is φ = 534204960.

The previous prime is 1002121441. The next prime is 1002121487. The reversal of 1002121455 is 5541212001.

It is not a de Polignac number, because 1002121455 - 2⁶ = 1002121391 is a prime.

It is a congruent number.

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, 17970 + ... + 48240.

It is an arithmetic number, because the mean of its divisors is an integer number (100260864).

Almost surely, 2^1002121455 is an apocalyptic number.

1002121455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1002121455 is a deficient number, since it is larger than the sum of its proper divisors (602052369).

1002121455 is a wasteful number, since it uses less digits than its factorization.

1002121455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32486.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1002121455 is about 31656.3019792268. The cubic root of 1002121455 is about 1000.7066521917.

Adding to 1002121455 its reverse (5541212001), we get a palindrome (6543333456).

The spelling of 1002121455 in words is "one billion, two million, one hundred twenty-one thousand, four hundred fifty-five".