1245451394 has 32 divisors (see below), whose sum is σ = 2070887040. Its totient is φ = 557020800.

The previous prime is 1245451373. The next prime is 1245451397. The reversal of 1245451394 is 4931545421.

It is a super-2 number, since 2×1245451394² = 3102298349633086472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1245451397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012772 + ... + 1014000.

It is an arithmetic number, because the mean of its divisors is an integer number (64715220).

Almost surely, 2^1245451394 is an apocalyptic number.

1245451394 is a deficient number, since it is larger than the sum of its proper divisors (825435646).

1245451394 is a wasteful number, since it uses less digits than its factorization.

1245451394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its digits is 86400, while the sum is 38.

The square root of 1245451394 is about 35290.9534300223. The cubic root of 1245451394 is about 1075.9091336459.

The spelling of 1245451394 in words is "one billion, two hundred forty-five million, four hundred fifty-one thousand, three hundred ninety-four".