1251510153241 has 4 divisors (see below), whose sum is σ = 1253444481792. Its totient is φ = 1249575824692.

The previous prime is 1251510153239. The next prime is 1251510153317. The reversal of 1251510153241 is 1423510151521.

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 1251510153241 - 2¹ = 1251510153239 is a prime.

It is a super-2 number, since 2×1251510153241² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251510153211) 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, 967163305 + ... + 967164598.

It is an arithmetic number, because the mean of its divisors is an integer number (313361120448).

Almost surely, 2^{1251510153241} is an apocalyptic number.

It is an amenable number.

1251510153241 is a deficient number, since it is larger than the sum of its proper divisors (1934328551).

1251510153241 is an equidigital number, since it uses as much as digits as its factorization.

1251510153241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934328550.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 1251510153241 in words is "one trillion, two hundred fifty-one billion, five hundred ten million, one hundred fifty-three thousand, two hundred forty-one".