1254021434 has 4 divisors (see below), whose sum is σ = 1881032154. Its totient is φ = 627010716.

The previous prime is 1254021407. The next prime is 1254021437. The reversal of 1254021434 is 4341204521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4341204521 = 28393 ⋅152897.

It can be written as a sum of positive squares in only one way, i.e., 1125267025 + 128754409 = 33545^2 + 11347^2 .

It is not an unprimeable number, because it can be changed into a prime (1254021437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313505357 + ... + 313505360.

Almost surely, 2^1254021434 is an apocalyptic number.

1254021434 is a deficient number, since it is larger than the sum of its proper divisors (627010720).

1254021434 is an equidigital number, since it uses as much as digits as its factorization.

1254021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627010719.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1254021434 is about 35412.1650566581. The cubic root of 1254021434 is about 1078.3712973428.

Adding to 1254021434 its reverse (4341204521), we get a palindrome (5595225955).

The spelling of 1254021434 in words is "one billion, two hundred fifty-four million, twenty-one thousand, four hundred thirty-four".