53421261 has 4 divisors (see below), whose sum is σ = 71228352. Its totient is φ = 35614172.

The previous prime is 53421253. The next prime is 53421283. The reversal of 53421261 is 16212435.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53421261 - 2³ = 53421253 is a prime.

It is a super-2 number, since 2×53421261² = 5707662253660242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53421241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8903541 + ... + 8903546.

It is an arithmetic number, because the mean of its divisors is an integer number (17807088).

Almost surely, 2^53421261 is an apocalyptic number.

It is an amenable number.

53421261 is a deficient number, since it is larger than the sum of its proper divisors (17807091).

53421261 is a wasteful number, since it uses less digits than its factorization.

53421261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17807090.

The product of its digits is 1440, while the sum is 24.

The square root of 53421261 is about 7308.9849500461. The cubic root of 53421261 is about 376.6211557338.

Adding to 53421261 its reverse (16212435), we get a palindrome (69633696).

The spelling of 53421261 in words is "fifty-three million, four hundred twenty-one thousand, two hundred sixty-one".