1245239387 has 8 divisors (see below), whose sum is σ = 1425062400. Its totient is φ = 1065899304.

The previous prime is 1245239383. The next prime is 1245239449. The reversal of 1245239387 is 7839325421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1245239387 - 2² = 1245239383 is a prime.

It is a super-2 number, since 2×1245239387² = 3101242261872271538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245239383) 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, 115187 + ... + 125532.

It is an arithmetic number, because the mean of its divisors is an integer number (178132800).

Almost surely, 2^1245239387 is an apocalyptic number.

1245239387 is a deficient number, since it is larger than the sum of its proper divisors (179823013).

1245239387 is an equidigital number, since it uses as much as digits as its factorization.

1245239387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241465.

The product of its digits is 362880, while the sum is 44.

The square root of 1245239387 is about 35287.9496003948. The cubic root of 1245239387 is about 1075.8480812937.

The spelling of 1245239387 in words is "one billion, two hundred forty-five million, two hundred thirty-nine thousand, three hundred eighty-seven".