1251424541 has 4 divisors (see below), whose sum is σ = 1254692352. Its totient is φ = 1248156732.

The previous prime is 1251424511. The next prime is 1251424567. The reversal of 1251424541 is 1454241521.

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 a cyclic number.

It is not a de Polignac number, because 1251424541 - 2⁶ = 1251424477 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 (1251424511) 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, 1633331 + ... + 1634096.

It is an arithmetic number, because the mean of its divisors is an integer number (313673088).

Almost surely, 2^1251424541 is an apocalyptic number.

It is an amenable number.

1251424541 is a deficient number, since it is larger than the sum of its proper divisors (3267811).

1251424541 is an equidigital number, since it uses as much as digits as its factorization.

1251424541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267810.

The product of its digits is 6400, while the sum is 29.

The square root of 1251424541 is about 35375.4793748438. The cubic root of 1251424541 is about 1077.6264004040.

The spelling of 1251424541 in words is "one billion, two hundred fifty-one million, four hundred twenty-four thousand, five hundred forty-one".