1605231250 has 48 divisors (see below), whose sum is σ = 3439654848. Its totient is φ = 550350000.

The previous prime is 1605231247. The next prime is 1605231253. The reversal of 1605231250 is 521325061.

It is an interprime number because it is at equal distance from previous prime (1605231247) and next prime (1605231253).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1605231253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25405 + ... + 62095.

It is an arithmetic number, because the mean of its divisors is an integer number (71659476).

Almost surely, 2^1605231250 is an apocalyptic number.

1605231250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1605231250 is an abundant number, since it is smaller than the sum of its proper divisors (1834423598).

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

1605231250 is an frugal number, since it uses more digits than its factorization.

1605231250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36725 (or 36705 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1605231250 is about 40065.3372630258. The cubic root of 1605231250 is about 1170.8803975740.

The spelling of 1605231250 in words is "one billion, six hundred five million, two hundred thirty-one thousand, two hundred fifty".