45020861 has 4 divisors (see below), whose sum is σ = 47390400. Its totient is φ = 42651324.

The previous prime is 45020839. The next prime is 45020863. The reversal of 45020861 is 16802054.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16802054 = 2 ⋅8401027.

It is a cyclic number.

It is not a de Polignac number, because 45020861 - 2¹⁰ = 45019837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45020861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45020863) 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, 1184741 + ... + 1184778.

It is an arithmetic number, because the mean of its divisors is an integer number (11847600).

Almost surely, 2^45020861 is an apocalyptic number.

It is an amenable number.

45020861 is a deficient number, since it is larger than the sum of its proper divisors (2369539).

45020861 is a wasteful number, since it uses less digits than its factorization.

45020861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369538.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 45020861 is about 6709.7586394743. The cubic root of 45020861 is about 355.7442851811.

The spelling of 45020861 in words is "forty-five million, twenty thousand, eight hundred sixty-one".