1249201847 has 2 divisors, whose sum is σ = 1249201848. Its totient is φ = 1249201846.

The previous prime is 1249201843. The next prime is 1249201897. The reversal of 1249201847 is 7481029421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1249201847 - 2² = 1249201843 is a prime.

It is a super-2 number, since 2×1249201847² = 3121010509096422818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1249201847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249201843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624600923 + 624600924.

It is an arithmetic number, because the mean of its divisors is an integer number (624600924).

Almost surely, 2^1249201847 is an apocalyptic number.

1249201847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249201847 is an equidigital number, since it uses as much as digits as its factorization.

1249201847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1249201847 is about 35344.0496689330. The cubic root of 1249201847 is about 1076.9880203979.

The spelling of 1249201847 in words is "one billion, two hundred forty-nine million, two hundred one thousand, eight hundred forty-seven".