45251642 has 4 divisors (see below), whose sum is σ = 67877466. Its totient is φ = 22625820.

The previous prime is 45251623. The next prime is 45251651. The reversal of 45251642 is 24615254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24615254 = 2 ⋅12307627.

It can be written as a sum of positive squares in only one way, i.e., 44209201 + 1042441 = 6649^2 + 1021^2 .

It is a super-2 number, since 2×45251642² = 4095422207392328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11312909 + ... + 11312912.

Almost surely, 2^45251642 is an apocalyptic number.

45251642 is a deficient number, since it is larger than the sum of its proper divisors (22625824).

45251642 is a wasteful number, since it uses less digits than its factorization.

45251642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22625823.

The product of its digits is 9600, while the sum is 29.

The square root of 45251642 is about 6726.9340713285. The cubic root of 45251642 is about 356.3511085948.

Adding to 45251642 its reverse (24615254), we get a palindrome (69866896).

The spelling of 45251642 in words is "forty-five million, two hundred fifty-one thousand, six hundred forty-two".