634642541 has 16 divisors (see below), whose sum is σ = 721035840. Its totient is φ = 553754880.

The previous prime is 634642529. The next prime is 634642543. The reversal of 634642541 is 145246436.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634642541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634642543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118661 + ... + 123893.

It is an arithmetic number, because the mean of its divisors is an integer number (45064740).

Almost surely, 2^634642541 is an apocalyptic number.

It is an amenable number.

634642541 is a deficient number, since it is larger than the sum of its proper divisors (86393299).

634642541 is a wasteful number, since it uses less digits than its factorization.

634642541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756.

The product of its digits is 69120, while the sum is 35.

The square root of 634642541 is about 25192.1126744066. The cubic root of 634642541 is about 859.3624899486.

Adding to 634642541 its reverse (145246436), we get a palindrome (779888977).

The spelling of 634642541 in words is "six hundred thirty-four million, six hundred forty-two thousand, five hundred forty-one".