45390481 has 4 divisors (see below), whose sum is σ = 46955700. Its totient is φ = 43825264.

The previous prime is 45390473. The next prime is 45390491. The reversal of 45390481 is 18409354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18409354 = 2 ⋅9204677.

It can be written as a sum of positive squares in 2 ways, for example, as 30305025 + 15085456 = 5505^2 + 3884^2 .

It is not a de Polignac number, because 45390481 - 2³ = 45390473 is a prime.

It is a super-2 number, since 2×45390481² = 4120591530822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45390421) 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, 782566 + ... + 782623.

It is an arithmetic number, because the mean of its divisors is an integer number (11738925).

Almost surely, 2^45390481 is an apocalyptic number.

It is an amenable number.

45390481 is a deficient number, since it is larger than the sum of its proper divisors (1565219).

45390481 is a wasteful number, since it uses less digits than its factorization.

45390481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565218.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 45390481 is about 6737.2458022548. The cubic root of 45390481 is about 356.7151831789.

The spelling of 45390481 in words is "forty-five million, three hundred ninety thousand, four hundred eighty-one".