3951240945 has 16 divisors (see below), whose sum is σ = 6329819520. Its totient is φ = 2104717184.

The previous prime is 3951240919. The next prime is 3951240947. The reversal of 3951240945 is 5490421593.

It is a cyclic number.

It is not a de Polignac number, because 3951240945 - 2⁵ = 3951240913 is a prime.

It is a super-2 number, since 2×3951240945² = 31224610010888986050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3951240897 and 3951240906.

It is not an unprimeable number, because it can be changed into a prime (3951240947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150669 + ... + 174938.

It is an arithmetic number, because the mean of its divisors is an integer number (395613720).

Almost surely, 2^3951240945 is an apocalyptic number.

It is an amenable number.

3951240945 is a deficient number, since it is larger than the sum of its proper divisors (2378578575).

3951240945 is a wasteful number, since it uses less digits than its factorization.

3951240945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326424.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 3951240945 is about 62858.8971029559. The cubic root of 3951240945 is about 1580.9246503782.

The spelling of 3951240945 in words is "three billion, nine hundred fifty-one million, two hundred forty thousand, nine hundred forty-five".