901649 has 6 divisors (see below), whose sum is σ = 1048914. Its totient is φ = 772800.

The previous prime is 901643. The next prime is 901657. The reversal of 901649 is 946109.

It can be written as a sum of positive squares in only one way, i.e., 753424 + 148225 = 868^2 + 385^2 .

It is not a de Polignac number, because 901649 - 2¹² = 897553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (901643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9152 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (174819).

2⁹⁰¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

901649 is a deficient number, since it is larger than the sum of its proper divisors (147265).

901649 is a wasteful number, since it uses less digits than its factorization.

901649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18415 (or 18408 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 901649 is about 949.5519996293. The cubic root of 901649 is about 96.6078688542.

The spelling of 901649 in words is "nine hundred one thousand, six hundred forty-nine".