1254134021 has 4 divisors (see below), whose sum is σ = 1433296032. Its totient is φ = 1074972012.

The previous prime is 1254133999. The next prime is 1254134023. The reversal of 1254134021 is 1204314521.

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 1254134021 - 2¹⁴ = 1254117637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254134023) 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, 89580995 + ... + 89581008.

It is an arithmetic number, because the mean of its divisors is an integer number (358324008).

Almost surely, 2^1254134021 is an apocalyptic number.

It is an amenable number.

1254134021 is a deficient number, since it is larger than the sum of its proper divisors (179162011).

1254134021 is an equidigital number, since it uses as much as digits as its factorization.

1254134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179162010.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1254134021 is about 35413.7546865621. The cubic root of 1254134021 is about 1078.4035687094.

Adding to 1254134021 its reverse (1204314521), we get a palindrome (2458448542).

The spelling of 1254134021 in words is "one billion, two hundred fifty-four million, one hundred thirty-four thousand, twenty-one".