1002136420 has 24 divisors (see below), whose sum is σ = 2135899584. Its totient is φ = 394871136.

The previous prime is 1002136363. The next prime is 1002136423. The reversal of 1002136420 is 246312001.

It is not an unprimeable number, because it can be changed into a prime (1002136423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372592 + ... + 375271.

It is an arithmetic number, because the mean of its divisors is an integer number (88995816).

Almost surely, 2^1002136420 is an apocalyptic number.

1002136420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002136420 is an abundant number, since it is smaller than the sum of its proper divisors (1133763164).

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

1002136420 is a wasteful number, since it uses less digits than its factorization.

1002136420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747939 (or 747937 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1002136420 is about 31656.5383451823. The cubic root of 1002136420 is about 1000.7116334577.

Adding to 1002136420 its reverse (246312001), we get a palindrome (1248448421).

The spelling of 1002136420 in words is "one billion, two million, one hundred thirty-six thousand, four hundred twenty".