45542642 has 4 divisors (see below), whose sum is σ = 68313966. Its totient is φ = 22771320.

The previous prime is 45542641. The next prime is 45542659. The reversal of 45542642 is 24624554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24624554 = 2 ⋅12312277.

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 20151121 = 5039^2 + 4489^2 .

It is a junction number, because it is equal to n+sod(n) for n = 45542599 and 45542608.

It is not an unprimeable number, because it can be changed into a prime (45542641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385659 + ... + 11385662.

Almost surely, 2^45542642 is an apocalyptic number.

45542642 is a deficient number, since it is larger than the sum of its proper divisors (22771324).

45542642 is a wasteful number, since it uses less digits than its factorization.

45542642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22771323.

The product of its digits is 38400, while the sum is 32.

The square root of 45542642 is about 6748.5288767257. The cubic root of 45542642 is about 357.1133400825.

The spelling of 45542642 in words is "forty-five million, five hundred forty-two thousand, six hundred forty-two".