2391951 has 8 divisors (see below), whose sum is σ = 3376944. Its totient is φ = 1500800.

The previous prime is 2391947. The next prime is 2391953. The reversal of 2391951 is 1591932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2391951 - 2² = 2391947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23400 + ... + 23501.

It is an arithmetic number, because the mean of its divisors is an integer number (422118).

2^2391951 is an apocalyptic number.

2391951 is a deficient number, since it is larger than the sum of its proper divisors (984993).

2391951 is a wasteful number, since it uses less digits than its factorization.

2391951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46921.

The product of its digits is 2430, while the sum is 30.

The square root of 2391951 is about 1546.5933531475. The cubic root of 2391951 is about 133.7367483304.

The spelling of 2391951 in words is "two million, three hundred ninety-one thousand, nine hundred fifty-one".