2947945 has 64 divisors (see below), whose sum is σ = 5160960. Its totient is φ = 1555200.

The previous prime is 2947939. The next prime is 2947949. The reversal of 2947945 is 5497492.

It is not a de Polignac number, because 2947945 - 2¹³ = 2939753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2947898 and 2947907.

It is not an unprimeable number, because it can be changed into a prime (2947949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 95080 + ... + 95110.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^2947945 is an apocalyptic number.

It is an amenable number.

2947945 is a deficient number, since it is larger than the sum of its proper divisors (2213015).

2947945 is a wasteful number, since it uses less digits than its factorization.

2947945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86.

The product of its digits is 90720, while the sum is 40.

The square root of 2947945 is about 1716.9580658828. The cubic root of 2947945 is about 143.3859040381.

It can be divided in two parts, 29 and 47945, that added together give a palindrome (47974).

The spelling of 2947945 in words is "two million, nine hundred forty-seven thousand, nine hundred forty-five".