53742421 has 8 divisors (see below), whose sum is σ = 56228544. Its totient is φ = 51268800.

The previous prime is 53742397. The next prime is 53742427. The reversal of 53742421 is 12424735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53742421 - 2¹¹ = 53740373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53742421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53742427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6310 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (7028568).

Almost surely, 2^53742421 is an apocalyptic number.

It is an amenable number.

53742421 is a deficient number, since it is larger than the sum of its proper divisors (2486123).

53742421 is a wasteful number, since it uses less digits than its factorization.

53742421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6251.

The product of its digits is 6720, while the sum is 28.

The square root of 53742421 is about 7330.9222475757. The cubic root of 53742421 is about 377.3743768661.

The spelling of 53742421 in words is "fifty-three million, seven hundred forty-two thousand, four hundred twenty-one".