24999961 has 4 divisors (see below), whose sum is σ = 28571392. Its totient is φ = 21428532.

The previous prime is 24999959. The next prime is 24999967. The reversal of 24999961 is 16999942.

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: 16999942 = 2 ⋅8499971.

It is a cyclic number.

It is not a de Polignac number, because 24999961 - 2¹ = 24999959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24999967) 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, 1785705 + ... + 1785718.

It is an arithmetic number, because the mean of its divisors is an integer number (7142848).

Almost surely, 2^24999961 is an apocalyptic number.

It is an amenable number.

24999961 is a deficient number, since it is larger than the sum of its proper divisors (3571431).

24999961 is an equidigital number, since it uses as much as digits as its factorization.

24999961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571430.

The product of its digits is 314928, while the sum is 49.

The square root of 24999961 is about 4999.9960999985. The cubic root of 24999961 is about 292.4016217723.

The spelling of 24999961 in words is "twenty-four million, nine hundred ninety-nine thousand, nine hundred sixty-one".