1245511642 has 16 divisors (see below), whose sum is σ = 1904700672. Its totient is φ = 610695360.

The previous prime is 1245511639. The next prime is 1245511643. The reversal of 1245511642 is 2461155421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1245511643) 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, 9042 + ... + 50722.

It is an arithmetic number, because the mean of its divisors is an integer number (119043792).

Almost surely, 2^1245511642 is an apocalyptic number.

1245511642 is a deficient number, since it is larger than the sum of its proper divisors (659189030).

1245511642 is a wasteful number, since it uses less digits than its factorization.

1245511642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41973.

The product of its digits is 9600, while the sum is 31.

The square root of 1245511642 is about 35291.8070095596. The cubic root of 1245511642 is about 1075.9264821962.

The spelling of 1245511642 in words is "one billion, two hundred forty-five million, five hundred eleven thousand, six hundred forty-two".