1245440142 has 24 divisors (see below), whose sum is σ = 2701141560. Its totient is φ = 414733200.

The previous prime is 1245440117. The next prime is 1245440171. The reversal of 1245440142 is 2410445421.

It is a super-2 number, since 2×1245440142² = 3102242294609960328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15609 + ... + 52292.

It is an arithmetic number, because the mean of its divisors is an integer number (112547565).

Almost surely, 2^1245440142 is an apocalyptic number.

1245440142 is an abundant number, since it is smaller than the sum of its proper divisors (1455701418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245440142 is a wasteful number, since it uses less digits than its factorization.

1245440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68928 (or 68925 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1245440142 is about 35290.7940120366. The cubic root of 1245440142 is about 1075.9058935446.

Adding to 1245440142 its reverse (2410445421), we get a palindrome (3655885563).

The spelling of 1245440142 in words is "one billion, two hundred forty-five million, four hundred forty thousand, one hundred forty-two".