1605256452 has 36 divisors (see below), whose sum is σ = 4065537840. Its totient is φ = 534056112.

The previous prime is 1605256451. The next prime is 1605256453. The reversal of 1605256452 is 2546525061.

1605256452 is a `hidden beast` number, since 1 + 6 + 0 + 5 + 2 + 5 + 645 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1605256451) and next prime (1605256453).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1605256451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23802 + ... + 61457.

Almost surely, 2^1605256452 is an apocalyptic number.

1605256452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1605256452 is an abundant number, since it is smaller than the sum of its proper divisors (2460281388).

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

1605256452 is a wasteful number, since it uses less digits than its factorization.

1605256452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85792 (or 85787 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1605256452 is about 40065.6517730587. The cubic root of 1605256452 is about 1170.8865251176.

The spelling of 1605256452 in words is "one billion, six hundred five million, two hundred fifty-six thousand, four hundred fifty-two".