1245121451 has 8 divisors (see below), whose sum is σ = 1426168800. Its totient is φ = 1064867328.

The previous prime is 1245121403. The next prime is 1245121457. The reversal of 1245121451 is 1541215421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1245121451 - 2²² = 1240927147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245121451.

It is not an unprimeable number, because it can be changed into a prime (1245121457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194936 + ... + 201221.

It is an arithmetic number, because the mean of its divisors is an integer number (178271100).

Almost surely, 2^1245121451 is an apocalyptic number.

1245121451 is a deficient number, since it is larger than the sum of its proper divisors (181047349).

1245121451 is an equidigital number, since it uses as much as digits as its factorization.

1245121451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396613.

The product of its digits is 1600, while the sum is 26.

The square root of 1245121451 is about 35286.2785087915. The cubic root of 1245121451 is about 1075.8141158767.

Adding to 1245121451 its reverse (1541215421), we get a palindrome (2786336872).

The spelling of 1245121451 in words is "one billion, two hundred forty-five million, one hundred twenty-one thousand, four hundred fifty-one".