1245089995 has 4 divisors (see below), whose sum is σ = 1494108000. Its totient is φ = 996071992.

The previous prime is 1245089987. The next prime is 1245089999. The reversal of 1245089995 is 5999805421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5999805421 = 1021 ⋅5876401.

It is a cyclic number.

It is not a de Polignac number, because 1245089995 - 2³ = 1245089987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245089999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124508995 + ... + 124509004.

It is an arithmetic number, because the mean of its divisors is an integer number (373527000).

Almost surely, 2^1245089995 is an apocalyptic number.

1245089995 is a deficient number, since it is larger than the sum of its proper divisors (249018005).

1245089995 is an equidigital number, since it uses as much as digits as its factorization.

1245089995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249018004.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The square root of 1245089995 is about 35285.8327803100. The cubic root of 1245089995 is about 1075.8050562266.

The spelling of 1245089995 in words is "one billion, two hundred forty-five million, eighty-nine thousand, nine hundred ninety-five".