901951 has 4 divisors (see below), whose sum is σ = 903904. Its totient is φ = 900000.

The previous prime is 901937. The next prime is 901963. The reversal of 901951 is 159109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159109 = 107 ⋅1487.

It is a 5-Lehmer number, since φ(901951) divides (901951-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 901951 - 2⁵ = 901919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (225976).

2⁹⁰¹⁹⁵¹ is an apocalyptic number.

901951 is a deficient number, since it is larger than the sum of its proper divisors (1953).

901951 is a wasteful number, since it uses less digits than its factorization.

901951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 901951 is about 949.7110086758. The cubic root of 901951 is about 96.6186536569.

The spelling of 901951 in words is "nine hundred one thousand, nine hundred fifty-one".