42670253 has 2 divisors, whose sum is σ = 42670254. Its totient is φ = 42670252.

The previous prime is 42670241. The next prime is 42670261. The reversal of 42670253 is 35207624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 16024009 = 5162^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 42670253 - 2⁶ = 42670189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42670283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21335126 + 21335127.

It is an arithmetic number, because the mean of its divisors is an integer number (21335127).

Almost surely, 2^42670253 is an apocalyptic number.

It is an amenable number.

42670253 is a deficient number, since it is larger than the sum of its proper divisors (1).

42670253 is an equidigital number, since it uses as much as digits as its factorization.

42670253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 42670253 is about 6532.2471631132. The cubic root of 42670253 is about 349.4419760913.

Adding to 42670253 its reverse (35207624), we get a palindrome (77877877).

The spelling of 42670253 in words is "forty-two million, six hundred seventy thousand, two hundred fifty-three".