1425727421 has 4 divisors (see below), whose sum is σ = 1426312512. Its totient is φ = 1425142332.

The previous prime is 1425727379. The next prime is 1425727447. The reversal of 1425727421 is 1247275241.

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.

It is a cyclic number.

It is not a de Polignac number, because 1425727421 - 2¹⁰ = 1425726397 is a prime.

It is a super-2 number, since 2×1425727421² = 4065397357982622482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425729421) 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, 288875 + ... + 293768.

It is an arithmetic number, because the mean of its divisors is an integer number (356578128).

Almost surely, 2^1425727421 is an apocalyptic number.

It is an amenable number.

1425727421 is a deficient number, since it is larger than the sum of its proper divisors (585091).

1425727421 is an equidigital number, since it uses as much as digits as its factorization.

1425727421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585090.

The product of its digits is 31360, while the sum is 35.

The square root of 1425727421 is about 37758.8058735972. The cubic root of 1425727421 is about 1125.5000038484.

The spelling of 1425727421 in words is "one billion, four hundred twenty-five million, seven hundred twenty-seven thousand, four hundred twenty-one".