1245749146 has 4 divisors (see below), whose sum is σ = 1868623722. Its totient is φ = 622874572.

The previous prime is 1245749111. The next prime is 1245749149. The reversal of 1245749146 is 6419475421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1185080625 + 60668521 = 34425^2 + 7789^2 .

It is not an unprimeable number, because it can be changed into a prime (1245749149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311437285 + ... + 311437288.

Almost surely, 2^1245749146 is an apocalyptic number.

1245749146 is a deficient number, since it is larger than the sum of its proper divisors (622874576).

1245749146 is an equidigital number, since it uses as much as digits as its factorization.

1245749146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622874575.

The product of its digits is 241920, while the sum is 43.

The square root of 1245749146 is about 35295.1717094562. The cubic root of 1245749146 is about 1075.9948665703.

The spelling of 1245749146 in words is "one billion, two hundred forty-five million, seven hundred forty-nine thousand, one hundred forty-six".