1601251612 has 6 divisors (see below), whose sum is σ = 2802190328. Its totient is φ = 800625804.

The previous prime is 1601251591. The next prime is 1601251637. The reversal of 1601251612 is 2161521061.

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 as a sum of consecutive naturals, namely, 200156448 + ... + 200156455.

Almost surely, 2^1601251612 is an apocalyptic number.

It is an amenable number.

1601251612 is a deficient number, since it is larger than the sum of its proper divisors (1200938716).

1601251612 is a wasteful number, since it uses less digits than its factorization.

1601251612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400312907 (or 400312905 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1601251612 is about 40015.6420915621. The cubic root of 1601251612 is about 1169.9119937700.

Adding to 1601251612 its reverse (2161521061), we get a palindrome (3762772673).

The spelling of 1601251612 in words is "one billion, six hundred one million, two hundred fifty-one thousand, six hundred twelve".