1642025140 has 24 divisors (see below), whose sum is σ = 3940860672. Its totient is φ = 562980000.

The previous prime is 1642025123. The next prime is 1642025207. The reversal of 1642025140 is 415202461.

It is a happy number.

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, 5864236 + ... + 5864515.

It is an arithmetic number, because the mean of its divisors is an integer number (164202528).

Almost surely, 2^1642025140 is an apocalyptic number.

1642025140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642025140 is an abundant number, since it is smaller than the sum of its proper divisors (2298835532).

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

1642025140 is a wasteful number, since it uses less digits than its factorization.

1642025140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728767 (or 11728765 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1642025140 is about 40521.9093824563. The cubic root of 1642025140 is about 1179.7589136886.

The spelling of 1642025140 in words is "one billion, six hundred forty-two million, twenty-five thousand, one hundred forty".