42525401 has 4 divisors (see below), whose sum is σ = 44763600. Its totient is φ = 40287204.

The previous prime is 42525389. The next prime is 42525419. The reversal of 42525401 is 10452524.

It is a happy number.

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 42525401 - 2¹⁴ = 42509017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42525481) 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, 1119071 + ... + 1119108.

It is an arithmetic number, because the mean of its divisors is an integer number (11190900).

Almost surely, 2^42525401 is an apocalyptic number.

It is an amenable number.

42525401 is a deficient number, since it is larger than the sum of its proper divisors (2238199).

42525401 is a wasteful number, since it uses less digits than its factorization.

42525401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238198.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42525401 is about 6521.1502819671. The cubic root of 42525401 is about 349.0461128496.

Adding to 42525401 its reverse (10452524), we get a palindrome (52977925).

The spelling of 42525401 in words is "forty-two million, five hundred twenty-five thousand, four hundred one".