42072453 has 10 divisors (see below), whose sum is σ = 62849094. Its totient is φ = 28048248.

The previous prime is 42072439. The next prime is 42072461. The reversal of 42072453 is 35427024.

42072453 is a `hidden beast` number, since 4 + 207 + 2 + 453 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37675044 + 4397409 = 6138^2 + 2097^2 .

It is not a de Polignac number, because 42072453 - 2⁵ = 42072421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42072463) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 259626 + ... + 259787.

Almost surely, 2^42072453 is an apocalyptic number.

It is an amenable number.

42072453 is a deficient number, since it is larger than the sum of its proper divisors (20776641).

42072453 is an equidigital number, since it uses as much as digits as its factorization.

42072453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519425 (or 519416 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 42072453 is about 6486.3281600610. The cubic root of 42072453 is about 347.8024294714.

Adding to 42072453 its reverse (35427024), we get a palindrome (77499477).

The spelling of 42072453 in words is "forty-two million, seventy-two thousand, four hundred fifty-three".