1601251701 has 32 divisors (see below), whose sum is σ = 2511925248. Its totient is φ = 888148800.

The previous prime is 1601251667. The next prime is 1601251703. The reversal of 1601251701 is 1071521061.

It is not a de Polignac number, because 1601251701 - 2⁶ = 1601251637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601251703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357526 + ... + 361976.

It is an arithmetic number, because the mean of its divisors is an integer number (78497664).

Almost surely, 2^1601251701 is an apocalyptic number.

It is an amenable number.

1601251701 is a deficient number, since it is larger than the sum of its proper divisors (910673547).

1601251701 is a wasteful number, since it uses less digits than its factorization.

1601251701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1601251701 is about 40015.6432036273. The cubic root of 1601251701 is about 1169.9120154452.

Adding to 1601251701 its reverse (1071521061), we get a palindrome (2672772762).

The spelling of 1601251701 in words is "one billion, six hundred one million, two hundred fifty-one thousand, seven hundred one".