5101945 has 4 divisors (see below), whose sum is σ = 6122340. Its totient is φ = 4081552.

The previous prime is 5101913. The next prime is 5101961. The reversal of 5101945 is 5491015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5491015 = 5 ⋅1098203.

It can be written as a sum of positive squares in 2 ways, for example, as 4012009 + 1089936 = 2003^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 5101945 - 2⁵ = 5101913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510190 + ... + 510199.

It is an arithmetic number, because the mean of its divisors is an integer number (1530585).

Almost surely, 2^5101945 is an apocalyptic number.

It is an amenable number.

5101945 is a deficient number, since it is larger than the sum of its proper divisors (1020395).

5101945 is a wasteful number, since it uses less digits than its factorization.

5101945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020394.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 5101945 is about 2258.7485473155. The cubic root of 5101945 is about 172.1519411850.

The spelling of 5101945 in words is "five million, one hundred one thousand, nine hundred forty-five".