1020148974257 has 4 divisors (see below), whose sum is σ = 1165884542016. Its totient is φ = 874413406500.

The previous prime is 1020148974253. The next prime is 1020148974269. The reversal of 1020148974257 is 7524798410201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020148974257 - 2² = 1020148974253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020148974253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72867783869 + ... + 72867783882.

It is an arithmetic number, because the mean of its divisors is an integer number (291471135504).

Almost surely, 2^{1020148974257} is an apocalyptic number.

It is an amenable number.

1020148974257 is a deficient number, since it is larger than the sum of its proper divisors (145735567759).

1020148974257 is an equidigital number, since it uses as much as digits as its factorization.

1020148974257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145735567758.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 1020148974257 in words is "one trillion, twenty billion, one hundred forty-eight million, nine hundred seventy-four thousand, two hundred fifty-seven".