801740421 has 6 divisors (see below), whose sum is σ = 1158069510. Its totient is φ = 534493608.

The previous prime is 801740413. The next prime is 801740431. The reversal of 801740421 is 124047108.

It can be written as a sum of positive squares in only one way, i.e., 540562500 + 261177921 = 23250^2 + 16161^2 .

It is not a de Polignac number, because 801740421 - 2³ = 801740413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801740431) 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, 44541126 + ... + 44541143.

It is an arithmetic number, because the mean of its divisors is an integer number (193011585).

Almost surely, 2^801740421 is an apocalyptic number.

It is an amenable number.

801740421 is a deficient number, since it is larger than the sum of its proper divisors (356329089).

801740421 is a wasteful number, since it uses less digits than its factorization.

801740421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89082275 (or 89082272 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 801740421 is about 28315.0211195401. The cubic root of 801740421 is about 928.9904723518.

Adding to 801740421 its reverse (124047108), we get a palindrome (925787529).

The spelling of 801740421 in words is "eight hundred one million, seven hundred forty thousand, four hundred twenty-one".