25273421 has 8 divisors (see below), whose sum is σ = 25857144. Its totient is φ = 24693760.

The previous prime is 25273411. The next prime is 25273427. The reversal of 25273421 is 12437252.

It can be written as a sum of positive squares in 4 ways, for example, as 15319396 + 9954025 = 3914^2 + 3155^2 .

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

It is not a de Polignac number, because 25273421 - 2¹⁰ = 25272397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25273427) 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, 14045 + ... + 15741.

It is an arithmetic number, because the mean of its divisors is an integer number (3232143).

Almost surely, 2^25273421 is an apocalyptic number.

It is an amenable number.

25273421 is a deficient number, since it is larger than the sum of its proper divisors (583723).

25273421 is a wasteful number, since it uses less digits than its factorization.

25273421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its digits is 3360, while the sum is 26.

The square root of 25273421 is about 5027.2677469974. The cubic root of 25273421 is about 293.4638949035.

The spelling of 25273421 in words is "twenty-five million, two hundred seventy-three thousand, four hundred twenty-one".