1220152547 has 2 divisors, whose sum is σ = 1220152548. Its totient is φ = 1220152546.

The previous prime is 1220152541. The next prime is 1220152567. The reversal of 1220152547 is 7452510221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220152547 - 2⁸ = 1220152291 is a prime.

It is a super-4 number, since 4×1220152547⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (1220152541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610076273 + 610076274.

It is an arithmetic number, because the mean of its divisors is an integer number (610076274).

Almost surely, 2^1220152547 is an apocalyptic number.

1220152547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220152547 is an equidigital number, since it uses as much as digits as its factorization.

1220152547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1220152547 is about 34930.6820288411. The cubic root of 1220152547 is about 1068.5742640864.

Adding to 1220152547 its reverse (7452510221), we get a palindrome (8672662768).

The spelling of 1220152547 in words is "one billion, two hundred twenty million, one hundred fifty-two thousand, five hundred forty-seven".