1245077157 has 4 divisors (see below), whose sum is σ = 1660102880. Its totient is φ = 830051436.

The previous prime is 1245077143. The next prime is 1245077189. The reversal of 1245077157 is 7517705421.

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 not a de Polignac number, because 1245077157 - 2¹¹ = 1245075109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245077137) 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, 207512857 + ... + 207512862.

It is an arithmetic number, because the mean of its divisors is an integer number (415025720).

Almost surely, 2^1245077157 is an apocalyptic number.

It is an amenable number.

1245077157 is a deficient number, since it is larger than the sum of its proper divisors (415025723).

1245077157 is an equidigital number, since it uses as much as digits as its factorization.

1245077157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415025722.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 1245077157 is about 35285.6508654722. The cubic root of 1245077157 is about 1075.8013587073.

The spelling of 1245077157 in words is "one billion, two hundred forty-five million, seventy-seven thousand, one hundred fifty-seven".