42153261 has 4 divisors (see below), whose sum is σ = 56204352. Its totient is φ = 28102172.

The previous prime is 42153239. The next prime is 42153263. The reversal of 42153261 is 16235124.

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 42153261 - 2¹⁹ = 41628973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42153263) 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, 7025541 + ... + 7025546.

It is an arithmetic number, because the mean of its divisors is an integer number (14051088).

Almost surely, 2^42153261 is an apocalyptic number.

It is an amenable number.

42153261 is a deficient number, since it is larger than the sum of its proper divisors (14051091).

42153261 is a wasteful number, since it uses less digits than its factorization.

42153261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14051090.

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

The square root of 42153261 is about 6492.5542739356. The cubic root of 42153261 is about 348.0249602258.

Adding to 42153261 its reverse (16235124), we get a palindrome (58388385).

The spelling of 42153261 in words is "forty-two million, one hundred fifty-three thousand, two hundred sixty-one".