1427258528121 has 4 divisors (see below), whose sum is σ = 1903011370832. Its totient is φ = 951505685412.

The previous prime is 1427258528083. The next prime is 1427258528131. The reversal of 1427258528121 is 1218258527241.

It is a happy number.

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 not a de Polignac number, because 1427258528121 - 2³¹ = 1425111044473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427258528131) 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, 237876421351 + ... + 237876421356.

It is an arithmetic number, because the mean of its divisors is an integer number (475752842708).

Almost surely, 2^{1427258528121} is an apocalyptic number.

It is an amenable number.

1427258528121 is a deficient number, since it is larger than the sum of its proper divisors (475752842711).

1427258528121 is an equidigital number, since it uses as much as digits as its factorization.

1427258528121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475752842710.

The product of its digits is 716800, while the sum is 48.

The spelling of 1427258528121 in words is "one trillion, four hundred twenty-seven billion, two hundred fifty-eight million, five hundred twenty-eight thousand, one hundred twenty-one".